We discussed the London bombings and Islamic extremism in our global phone-in programme, Talking Point.
The family of the Circle Line bomber say they think he may have been "brain- washed" by terrorists.
Mohammad Sidique Khan's relatives express "deepest and heartfelt sympathies to all the innocent victims" and ask people to help "expose these terror networks which target and groom our sons to carry out such evils."
They said if they had known, they had would have done everything to stop the teaching assistant carrying out Britain's first suicide attacks.
On Friday, the family of 18-year-old bomber Hasib Mir Hussain also said they were "devastated" by what had happened.
The two Leeds men were killed in last Thursday's bomb blasts along with Shehzad Tanweer and Lindsey Germaine.
Did you know any of the suspects? If the bombers' families didn't know, how can terrorism like this be tackled? What brings a British citizen to kill fellow British citizens?
This debate is now closed. Read a selection of your comments below.
The following comments reflect the balance of opinion we have received so far:
It amazes me how stupid and selfish some people can be! These men have freedom of speech and action, they're protected and looked after by the state, and still they feel they need to kill themselves and other people to make a non-existent point.
Mo C, UK
Sorry, but David from Glasgow's comments incensed me. "..the IRA never attacked civilians directly.." is complete rubbish. Look at how many times they deliberately killed ordinary people doing an ordinary job of work because they were regarded as 'collaborators'. Look at the cases of the disappeared, and Robert McCartney, and wise up. The point is that when people regard killing anyone as acceptable for the furtherance of their cause, be it Irish republicanism or the world domination of Islam, it paves the way for the terrorist atrocities we've seen for over 30 years in Northern Ireland, 9/11 and the London bombings. To suggest there is any difference between the psychopaths in the IRA and those claiming to be Muslim is both foolish and offensive.
Dave, Moira, N. Ireland
Being told that the bombers were born here and come from a reasonably well off family makes people even MORE nervous. How can we feel safe if a section of our own society wants to kill us? We need to see Muslims actively banning preachers of hate and that funds being collected are not financing bombers and/or hatred. Failure to do this will continue to lead to mistrust of Muslims.
Mick Hines, Gosport
I had planned a holiday in London with my wife and kids before the London bombing and I am not going to change my plans. We, as a community of ordinary citizens of the world, should make an effort to tell these terrorists that we are not afraid. I commend the people of Britain, that they have not turned this into a racial issue and have treated this as a terrorist action carried out by people whose aim is to kill and cause chaos by dividing communities racially and religiously.
Imran Maqbool, Faisalabad, Pakistan
It does not matter if the bombers are British. What matters is they killed innocent people in the name of Islam and brought carnage to the country that gave them shelter and pride. I just hope there is no backlash against law-abiding citizens, Muslim or otherwise. Those who masterminded the carnage in London would really feel they'd won. We must all show a united front, as all our communities have been affected, whatever our ethnicity.
JL, London, UK
We have had enough warning with various examples of educated anglicised British Muslims killing and murdering abroad. We've seemingly turned a blind eye to various fundamentalists setting up shop here. We allowed them more liberty and free speech than in their countries of origin. I cannot see what the stumbling block is for the Govt not trying them for treason as they have conspired against their country. When they are caught the local community espouses the same comments: "They were normal sports-loving boys", "He would not hurt a fly" etc.
Hetal Patel, Pinner, UK
British born. With British passports. So ID cards would not have stopped this. Surely this is the sign that the whole ID card fiasco is a total waste.
Nigel , Gunnislake, Cornwall
I am not afraid! These fools should be. They are in the process of ruining all hope for Muslim and other ethnic communities in the UK. May the British born bombers' God help them!
Rory Macgregor, Scotland
Is it about time we asked ourselves the ultimate question about US and other western soldiers withdrawing from Muslim countries? These guys want to chart their own future. They don't like what the Israelis are doing in Palestine. They hate what the Coalition of the Willing is doing to Iraqis. What would be the reaction if for example, for whatever reason, Iran forces defeated the British army and occupied the UK, took Tony Blair prisoner and installed a provisional government on the principles of 'Islamic democracy'?
John Birongo, Kenya
At least this might finally silence those who blame "lax" border controls and immigration for all our ills. Perhaps rather than being paranoid about foreigners, we should turn the attention of our security effort firmly against the British Muslim community which, for all its protestations of innocence, seems to have been the source of these evil men.
I think the bombers with their so-called martyrdom have brought shame on their religion, anguish and grief for their families and made every Muslim in this country a target for racial attack.
M Russell, Folkestone, Kent
Makes no difference where you are born but the ideology and values you carry. Criminals and terrorists do not have a nationality. I am a British born Muslim and I was never taught such ideology because it does not exist.
Shaf, UK & Sweden
Tighter immigration quotas wouldn't have stopped such atrocities but with six million immigrants in Britain, it might have made it easier to detect or shut down the extensive support network that these people have been able to rely upon for the motivation, equipment and financing to carry out their disgusting attacks
Richard, Northants, UK
And still we search for evidence of outside influence, of 'brainwashing', of other countries to blame. Is it not possible, or even likely, that they found everything they needed to be so hateful and hurtful in the UK?
Matt, Amsterdam, The Netherlands (ex UK)
I suspect the bombers were young and at a time in their lives when they were emotionally unstable and looking for ways to change the world. I suspect the bombers were 'wound up' by irresponsible people within their social circles; and I suspect those same people are now horrified by the consequences; or they were deliberately groomed for the job.
Who has indoctrinated them to be fanatic? Who have they been talking to? Who gave them the explosives and the know how?
David Andrews, Bristol
All faiths in Britain should stand together at this time. The mindless and the impressionable should be made to realise that this is not a religious issue, as a bomb blast has no preference to whose life it takes.
The bombers were described by neighbours and relatives as good Muslim lads who were liked and respected. One of them had a baby. I too am a Muslim with young children. I am liked and respected by my neighbours. Will people suspect that I could be the same? A potential murderer? I hope these evil doers have not planted the seeds of mistrust and fear in the hearts of my fellow Brits.
Ashruf Patel, Leicester, UK
I just am in a state of shock to say the least, I lived in the house opposite the one police raided in Colwyn Road for 12 years. To think that something like this was living right on your doorstep is so scary, I just hope that others do not judge other Muslims for these terrible acts, remember the ones that carried out the bombings could not be called true Muslims.
Neil, Beeston, Leeds
Friday morning in Beeston. One hundred metres away are the road blocks, the houses screened from public view, the news vans, the reporters and the blue and white police tape. Groups of residents congregate around the police cordons - speculating, contemplating and trying to come to terms with what's happened and the disbelief that terrorists have lived in their midst. There's an uneasy calm, many Muslims fear they may be the target of reprisals while people of all walks of life fear recent events could be the trigger for more generalised violence from the disaffected youth of the area. In the face of adversity we saw the true spirit of Londoners and we're seeing something similar here in Beeston. Where previously there were divisions as a result of different languages, different cultures, different religions, there's now a unity between many people brought about by a shared horror at the attacks and that the perpetrators came from within. If we can strengthen these new found bonds and build bridges between the communities then not only will the terrorists have failed but they'll have failed miserably.
Jon B, Leeds, UK
The organisers of this attack have obviously picked these lads to cause as much religious hatred and division as possible. I think we should go out of our way to get to know more about each others religions and cultures, and bring them together so they do not succeed. My heart goes out to their families, they must be devastated, not only to loose a son, but to know they have done something like this, how can they cope with that.
Lisa Cooke, Livingston Scotland
When born in this country, there is a lot to live for... As a British Muslim I am hurt by the betrayal of not only my faith but of this country by these men. We need to root out the people that are manipulating impressionable members of the community and deal with them accordingly. The society of the UK is a great one because of it's diversity, we should fight to keep it whole.
Z, London, UK
I live just a few doors down from one of the houses currently being searched in Beeston. From my experience, over the eight years I have lived in this house, these misguided young men are the exception. Our community is a community in the full sense of the word. We all live together harmoniously regardless of our racial or ethnic background. This is a time for the community to pull together to support families where needed and to support each other. We need to stay calm and remember that everyone is our neighbour.
Moira Parkin, Leeds
This sick crime was not in the name of Islam, no more than Abu Ghraib crimes were in the name of the American Christian population. Too much focus is on Muslims to defend themselves against a crime that is so remotely connected to them. It is more to do with the society, policy and world affairs than Islam as a religion.
Since I am a true and peaceful Muslim, I always seriously condemn this kind of terrorist attack. A real Muslim can never involve in such innocent killing. Islam is religion of total peace. So if any Muslim group is involved in such a terrorist activities, it can never claim them as Muslim.
Habibullah Mizan, Dhaka, Bangladesh
I would like to hear Muslim clerics tell people thinking of being suicide bombers that instead of meeting up with Allah, they will be condemned to eternal damnation.
It's not enough for the Muslim community to say these bombings are incompatible with Islam. If they were serious, they'd issue a fatwa that these bombers are now, by their actions, apostates and denied any right to a Muslim burial.
Marc Brett, Teddington, UK
How disingenuous and hypocritical to bomb the very society that provided not only opportunities that half the world strives to obtain, but also political and religious freedom. If these young men despised their country of birth so much, why didn't they immigrate to a country which tolerates or even promotes religious and political intolerance?
Ann, Los Angeles USA
I was disgusted to hear that the bombers were British born. I strongly believe that no matter what religion a person is, he or she should be absolutely loyal to their country.
I fear this attack will become yet more fodder for Blair and Bush, who would seem to have us believe that the solution to terrorism is totalitarianism at home and imperialism abroad. Ignored will be the fact that foreign policy affects us domestically, and that if our foreign policy harms others then potential terrorists will have motivation to harm us.
Paul Hollander, San Francisco, California
It is clear that we must now focus our attention on our youth. If the bombers were British, then the chances of the UK developing into a divided, panicked society increases... There needs to be a hard-hitting campaign in all schools and youth centres around the country, aiming to combat the backlash that this news is already creating. Young people are scared, confused, passionate and angry, and are the primary targets of extremists on all sides.
Danny C, Chicago / London
Whilst such action is deplored, why should it be any worse that it is suspected that the bombers are British born? The circumstances and reasons driving people into the arms of organisations that do such things are no different here to anywhere else. If our electorate were less complacent they would see through the lies Blair and others carefully craft to deceive us.
Alan Penny, Truro, UK
Apart from the horror of the bombings, I feel for the parents who came to this country from Pakistan and no doubt worked hard to give their children a better future. Catch the people who prey on youngsters who are looking for an identity.
J Carducci, Brit in US
British born? So what? I think it would be more important to know who financed, led and encouraged these men to act and why? A very professional hand deftly guided these men into place. These four men may not have even known they were going to die. Moreover, the hand guiding them may have had nothing to do Muslims and everything to do with world politics.
David James, Phoenix, Arizona, USA
I am son of a Muslim cleric. The teachings included to love and respect Allah's creations... The bombings in London, like the bombings elsewhere in the world is the work cowards with very evil intention. How can a loathsome act such as this be justified by any religion or philosophy?
Aala Shariati, Vancouver, Canada
What causes a person to give up the most dearest thing to him / her, his/her life? It's physical torture and mental stress which might cause this to happen... About London , I seriously don't know why a Muslim would do such a thing. Maybe they had relatives who died in Iraq or something? I would not call them good Muslims, if they were Muslims.
Mallick Sahab, Patna, Bihar, India
I'm a Canadian, a Canadian Muslim; my loyalties and my patriotism lies with this nation I reside in. I cannot fathom how these British born individuals could be so blind. I'm Pakistani by descent, as the alleged perpetrators are believed to be, so I can understand where the conservatism and orthodoxy in their mind-set may have been conceived. But to further that conservatism into extremism and to act on it is simply radical. We as Muslims must implore and must dissent if we expect these extremists to be defeated and to keep them from further perverting our faith and our image.
Adam, Toronto, Canada
The leaders of every mosque in the UK should organise a simple memorial to all the victims (with photo and brief biography) of the London bombs outside their mosques as an act of solidarity with their fellow citizens, and maybe to make some of the younger and more easily influenced members of their community stop and think. It may help in some small way to prevent the radicalization of a tiny minority.
Tim Gaffney, Melbourne/London (British)
The enemy within, is something that every nation, person and security service dreads. This case seems to show, that the boy next door, who plays cricket with you, one week, can turn out to be part of a bomb plot against fellow citizens, impacts our individual day to day sense of safety. For those of us who used to question the use of CCTV monitoring our daily activity, the access to CCTV footage, in this case, has surely proved a vital tool to identify the bombing perpetrators. However, there is obviously much work to be done to hopefully identify and develop effective interventions that will prevent idealistic young men and women turning to such drastic and deadly solutions, where their fellow countryman can be depersonalised and destroyed, seemingly, without conscience.
Pat van der Veer, Wallasey, across the river from Liverpool
In a free society, there is always going to be the possibility that certain members of that society will carry out great atrocities before their freedom is curtailed. It's impossible to prevent - it is the price of our liberty, and the way it should remain, because the alternative of living in a police state is far worse.
Dave, Nottingham, UK
The fertile soil of reactionary behaviour is not in a country, it's in the mind. Thus the futility of a global 'war on terror' fought with today's weapons of fear and paranoia that are so busily chasing and shooting at shadows. In the end everybody is suspect and, unfortunately, it looks as if that is what the future holds so long as the powers-that-be continue to fail to address the real issues of why people are driven to react so violently.
David Kersten, Singapore
I am a Pakistani born British Muslim working in US and I am shocked and horrified that people from my community will take part in killing of innocent people, these people are not Muslim but fanatics brain washed by people with horrible motives. I urge every Pakistani community leader, mosque heads and parents to wake to the belief that when their kids suddenly change into a religious way of life it might not be because they love the religion or the way of life, it is because some horrible person is brain washing these kids. Most of the Pakistani parents think this is awesome because their kids have moved away from the British life and now are praying five times a day, therefore they must be good Muslims. Please, this is all a front. We as a community have to love our British way of life and if we decide to work within the boundaries of our religion, then we can live in peace and harmony. We have to educate our children and teach them that killing any other human being is strictly against the teaching of Islam. I hope this incident wakes our community leaders from the false dreams and petty politics - education and teaching of tolerance and harmony is the key.
Tariq Javed, New York, US
It is one thing to be born and raised in cultural isolation in a part of the world that preaches hatred and intolerance, but it is quite another to be born and raised in one of the most socially responsible countries in the world, where access to knowledge and opportunity is almost unlimited.
John, NJ, USA
Country of birth is irrelevant. It only clouds the real issue which is Fundamentalist Islam.
Lawrence, San Francisco
I would like to thank Kamran, London for his recent comments. I think the local Muslim community must work hard to help us all rid this scourge. I'm afraid I draw the line at calling these cowards British.
Jim, Sydney, Australia
Just because the terrorists were British born does not mean that all British Muslims are terrorists. Remember that Hitler was an extremist, but we don't go around tarring all Austrians with the same brush. The only way to defeat the terrorists is to foster better community relations and greater understanding between different cultures and religions.
It is damaging that a picture has been put into our heads as to who a terrorist is, what they should look like, or where they should come from. Assuming such things leads to more damage. The point is anyone can choose to follow the ways of terrorism regardless of where they come from or how they were raised.
Robin, Phoenix, Arizona, USA
It is not entirely surprising that the bombers were British born. The US, as a nation of immigrants, is a more ethnically diverse country than the UK. However, 9/11 aside, numerically most US domestic terrorism historically has been performed by US born citizens. You need only recall such groups as the Ku Klux Klan, the Sudanese Liberation Army, or the Earth Liberation Front.
Bill Kat, Lexington, KY, USA
This is no surprise. Many of the more moderate imams in Britain live in fear from the extremist thugs. British people need to give much more support to moderates in the Muslim community.
Taha, Oxford, UK
Charles Kennedy is spot on. When governments use the beating of terrorism as justification for invading Iraq, then there will also be people who imagine that the invasion of Iraq somehow justifies terrorism.
I hope this sounds the death knell for the ridiculous ID card bill that they claim will defeat terrorism, whilst costing us hundreds of pounds each. The presence of ID cards would have been absolutely useless in this case.
I can't believe the people that did this were British. I'm outraged to know our own country can let us down this much. We are supposed to stick together and make an effort to support each other against these things.
Although I am a long way away now, I was born in London and lived through the blitz. The world is full of violence and angry bigoted people but they are outnumbered by the millions of honest God fearing people and this silent majority will win in the end.
Bob J. Pratt, Suva, Fiji
Let's now see the UK Islamic community take clear, decisive, visible action to root out the supporters and potential perpetrators of this kind of action, and demonstrate the community commitment to upholding UK laws and democracy.
Martyn Lee, UK
I am not surprised. My heart goes for the innocent people who were killed in this incident. The people who did this are misguided and brainwashed youngsters. We need to find the people who are motivating them to commit such dreadful crimes and punish them.
I just hope that people realise that it was no accident on the bombers part that they will be traced as being British Muslims. A sick attempt to incite racial hatred by faceless cowards.
Peter Jackson, Portsmouth
To those people in the UK who are going to be involved in racist "revenge" attacks, just remember, you are just giving into the terrorists. If this leads to disharmony, racial attacks and riots in our country, they are still winning. They want to disrupt our normal lives, terrorise us. Any actions taken by racists in this country by way of "revenge" is aimed at the wrong people, and is further dividing our society.
Helen H, Cheshire, UK
It does matter that they were British. It does matter they blew up innocent people. Where is the control in this country? How can people like this go unchecked and undiscovered?
What was it that Enoch Powell said all those years ago and for which he was vilified by a section of our community?
Stuart, Northampton, UK
Have to say good work so far by the police in getting this far so quickly. I think this quite clearly shows the extreme nature of the threat and that ID cards would have been useless. The only way we could have known would have been for someone who knew them to notice something was strange, and by latest accounts they did nothing to indicate they would do something like this.
Raf, St Neots
Anger and disappointment comes to mind. This opens a new front on the fight against terrorism at home. Questions need to be asked whether our embrace of diversity has been too fast at the expense of integration and empowerment for certain communities. A lot of work needed to be done in the next decade if indeed the bombers are British radical Islamists.
Linh Doan, Houston (British ex-pat), USA
Well done to the police. We must face the truth. Hatred is within human nature and we must never be arrogant enough to think it is a sentiment foreign to each one of us at one level or another.
David, Leeds, UK
Criminals come from all communities and countries. The great thing about the British is that, most of them, recognise that fact. Most British Muslims are as, or even more, horrified by this news because it paints them as something they aren't. Britain's strength is its cross-cultural solidarity. I hope the terrorists never break that.
Liam F, Bracken Ridge, QLD, Australia
We need a symbol of unity. Back in the 70's when racist thugs were splitting communities someone started Rock Against Racism... it had a badge, a white and a black hand shaking. We need something like this now. A symbol for all people on the side of peace and tolerance to wear, to show each other our caring and support for each other, and for the diversity that makes Britain great.
Kate Cooper, Leeds, England
First of all, I think the police should be praised in their quick work to track these bombers down. I have no ill feelings towards Muslims or any other faith or race come to that. This appalling crime was targeted at us all. We should all fight this together.
Mark, Southampton, UK
The media needs to learn that not all Asian people are Muslims and that there are many other people of Asian ethnicity that practice and follow other religions and faiths such as Sikhism and Hinduism. So before the media keep stating that the Muslim community are receiving abusive threats, it is in fact the whole Asian community, as many of us look alike.
If terrorists are now British born how will spending billions on ID cards make us any more secure?!?
Perhaps this should make the government think again about multiculturalism. Instead of trying to pander to every kind of faith imaginable, there should be a set of common values that define a what British person should be, regardless of religion, colour or creed.
Darren, Manchester, UK
It's not shocking to find they were British. What is shocking is the number of people who think that they ought not to have been British, or that only foreigners would be capable of this atrocity, or have a not in my back yard attitude to this. Some countries have lived with the fear of bombing within their own country on a daily basis for years. Now we know how it feels. Terrorism isn't something inflicted on us by some mysterious 'foreigners'. We must all look for ways to stop this, but the problem is ours to fix.
If the terrorists are British born, then it should make things much easier - they will have verifiable backgrounds and histories and all sorts of other traces. Their families are here and could help in revealing their activities and connections.
William Standley, Rowley Regis
What has happened in London is so terrible that I can not imagine how the families of the victims feel and the terror that any of the people caught up in such a horrific thing might feel. I can only say my heart and prayers go out to them all. But I would like to add that the individuals that are now taking revenge against innocent Muslim people are no better than the terrorist that planted the bombs as they themselves have become terrorists.
Hazel Cavilla, Cambridgeshire
Surely foreign-born terrorists would be harder to investigate? It may be shocking that this is a case of "traitors in our midst", but at the same time it narrows down the options.
Stephen Faraday, London
Wake up and smell the coffee. Two British born bombers also murdered civilians in Tel Aviv. People seem only to pay attention now when this is happening on their own soil.
It is not a question of place of birth - we need to ask what made these terrorist love death more than we love life.
Tarkan, Toronto, Canada
It's not surprising at all, no matter what nationality they have. Their brain's had been washed to such an extent that they weren't even bothered about the people they left behind.
Nondini Hussain, London, UK
This changes nothing. It only reinforces the simple fact that these people were not Muslims, but people looking for an excuse to hit out at perceived injustices in their own lives. We don't need ID cards, or to give up civil liberties to prove that, we just need to remind people how good we have it here. And the way Londoners are getting back to business is going a long way to show it.
Jon, Manchester, UK
We are now all looking at our neighbours wondering. The most worrying aftermath is the lack of trust we now have about those living close to us. We must not let the fanatics win. Four people should not be allowed to destroy the trust and community in this country.
Chris Healey, Liskeard, UK
I sit here now, hoping that these misguided individuals are not Muslims. Virtually all Muslims are peaceful folk with every right to exist in our society. I hate to imagine the problems this atrocity will cause to peaceful, law abiding people if the motive proves religious or racial.
Ant Butler, Coventry, UK
The indicators have been around for a while. British citizens have been detained at Guantanamo Bay and have attempted to sabotage airliners. This should come as no surprise. Unfortunately it means the entire Muslim community will now come under close scrutiny by intelligence services.
Why should a British born person do something like this? Who or what is influencing those young Brits to make them want to such a thing? What is going on in the minds of those young people to brainwash them in such a terrible way?
Pieter, Berne, Switzerland
I think we need to ask our leaders and each other how real and effective the community integration is within our United Kingdom and start addressing those gaps, which have clearly enabled and fuelled British people to kill other British people.
I live just up the hill from where the raids in Dewsbury have taken place. All members of the community have been shocked by the revelation that one of us is involved in such a heinous crime. West Yorkshire has had its fair share of troubles in the past but never terrorism. At my college today all my friends, Christian, Muslim, Hindu expressed their anxiety that such thing represents, but there were no signs of splits. All us decent folk are united in our condemnation, united because we know that it's just mindless and evil extremists that are trying to divide us. They want to see honest people, whatever their religion or politics, divided, if that happens then the perpetrators of the revenge attacks are no better then the terrorists themselves, and the only victors will be the terrorists. I urge all people to stand firm together. Britain is too strong to let this get in our way.
Ted Allatt, Thornhill, Dewsbury, West Yorks
I was appalled at the bombings in London. Even more so by the fact the bombers were living so close to here. We as a community must not tolerate these people. I am a British Muslim, I value my freedom, I value this country. I would fight for my country if called upon no matter what. If you don't feel as I do, by all means leave. That is the honourable thing to do.
Vik, Dewsbury, West Yorkshire
Over time, the people in Britain have shaped a society that is fair and harmonious. This harmony is now under threat, I hope people in Britain cooperate and preserve our future together.
British born or not, so far the world has been fortunate that these terrorists have not had the means to use WMD in their terrible acts, God help us all if they ever get to that critical phase, our vigilance and cooperation by our security infrastructures is paramount to prevent this from ever happening in the future.
The attacks were inhumane, the attackers have spilt innocent blood and cannot call themselves 'Muslims' as Islam is a religion of peace. These cruel people have resorted to an act which is unjust and can never be justified. My condolences to all those innocent people who have been affected by these cruel and thoughtless acts.
Sajida, Peterborough, UK
The fact that we seem to be dealing with the possibility of British born suicide bombers would seem to call for a far reaching debate, not on the merits of ID cards, but on what we mean by 'ID' itself; in other words, on the state and effectiveness of the current model of a multicultural society in the 21st century. Perhaps its glib use by politicians has blurred the vision and made it such a 'squashy' term that it lacks a credible, stable, useful definition. And let's take a broader perspective. Whilst we are focussing on British bombers targeting London commuters (my girlfriend among them) it falls into a global pattern of cultural alienation. We have religion being used as an excuse for the exercise of deep-seated fears. Terrorism sets out to create fear at the same time as it is a response to fear. And even though these people may blow themselves up in the name of religion but in the process they abuse and besmirch the idea of religion itself. Shouldn't we all, therefore, be asking how we reconcile different cultures and approaches not in the interests of creating a singular vision of society but a more expansive framework of cultural reconciliation that multiculturalism has so far largely failed to achieve?
DR Jones, Warwick
We must understand the root causes: discrimination, injustice and prejudice towards Muslims in UK and other so-called enlightened societies. We must eliminate the root causes, instead of fighting the symptoms.
Leon Rosgarten, London, UK
This needs to be considered in any future debate on ID cards. How, precisely, would ID cards have prevented this?
Jason, Portsmouth, UK
I fear nothing will happen to reduce this threat. A lot of initiatives will be planned, along with a lot of protesting from the talking heads of the civil liberties brigade, with the end result being that any action needed to stop this occurring again will not be taken. Also, I really don't think that "better community relations" would have prevented these attacks. Having cups of tea with extremists won't make them reconsider your status.
David, Nr. Wolverhampton, UK
It didn't surprise me that they were from my homeland. I wonder if they thought of the consequences of their actions to their fellow Muslim brothers and sisters. I fear there will be a backlash from the more right-wing elements of the population. For every step the Muslim council of Great Britain takes to show this country the goodness in Islam and how Muslims follow the path of peace, actions like this sets them backs years of work.
David Crimmin, Bognor Regis, UK
The US has had its own home-grown bombers, such as Timothy McVeigh. Don't try to "understand' such behaviour; criminalize and stigmatize it, period.
Sue, NJ, USA
I feel awful for the Hindu and Sikh communities who are judged by appearance, please let us reserve judgment as lashing out will only make things worse in the long term.
Stu, London, UK
Where you are born has no effect on your beliefs. As far as I am aware this is the first suicide style bomb attack in Europe and that is very worrying. There is no way to stop a suicide bomber from causing death. They can strike anywhere, any crowded place.
Terry, Epsom, Surrey, England
The fact that the bombers are believed to have been born in the UK, demonstrates that terrorism is not a result of a lack of freedom, opportunity, living in poverty, and all the other "root causes" that are touted each time there is an attack. The root cause of terrorism, quite simply, is hate. The root cause of the hate in regards to terrorism is an ideological belief in a system of moral extremes that preaches and rewards violence perpetuated by hate. Hate thrives in both affluent and impoverished peoples and nations. The only thing moral extremism needs to flourish is an open and accepting ear, and the romanticization of a cause as just and noble.
Severus, Montreal, Canada
I am absolutely disgusted. Both as a British citizen and also as a Muslim. No matter what people have said, I believed that the bombers were non-British, so it came as a great shock once it was revealed that they were actually British. Where did they get all their hate from? This is the one chance we all have no matter what we are, to come together as one. As a nation. As the British people we are and should be proud of being.
Anita Hussain, Leeds, UK
I am surprised. If they are UK born, surely they must have seen the thousands of Londoners marching in protest against the War in Iraq back in 2002 and 2003. Why would they kill those same people?
Helen, Oxford, UK
My reaction to the London bombings is the same reaction to the IRA bombings. Sad, but the IRA are mostly British born and if the British Government through diplomatic and political channels can stop the attacks carried out by the IRA, they can also wipe out the motives for the recent London bombings. I am a member of the Ahmadiyya Muslim Association. Terrorism of all sorts is condemned root and branch and our motto is Love for all and hatred for none and peace be upon all of you.
M O C Eesay, London, England
At the end of the day does it really matter what nationality the bombers were. Hatred is not limited to international boundaries. The simple truth is that it's more chilling to know that you are dealing with an enemy who is willing to lay down his life to further his goals.
Rick C, Austin, TX
The main difference between the IRA and attacks like this is the IRA never attacked civilians directly; they always had warnings to deliberately avoid high civilian causalities. The only time they didn't was when they where attacking soldiers/policemen. The IRA did this because they knew attacking civilians directly would lose support from their own people, but more importantly there motive was to cause financial damage, so NI would be just too expensive to hold on to. The 'war' with the IRA has been over since 1997. This London bombing was an attempt to kill as many civilians as possible, and was absolutely disgraceful. It doesn't even have the slightest hint of Irish terrorism, we have to be careful who we point the finger at.
David, Glasgow, Scotland
Have to disagree with David from Scotland about the IRA. They did target civilians without warning - they bombed people getting off the train in front of me at Victoria Station in Feb 1991. Killed one man and injured 38.
It's scary to think that these people lived here, but I'm impressed with the speed at which the investigation is being conducted. Let's hope there are no more incidents. I hope everyone realises that the families of the bombers are not to blame - they're probably as shocked as everyone else, if not more.
Emily, Leeds, UK
In my eyes if these are British citizens then they have performed an act of treason against this country and its people and should be dealt with accordingly.
Alec, York, UK
Hopefully this will be made public here in the USA so we start to realise that closing our borders and imposing more and more security measures on foreign born citizens is not the way to go. Actually promoting an inclusive society and reflecting that in one's foreign policy is likely to be far more helpful.
Ed, Oakland, USA
Those who committed the bombings in London last week sought to create division and sow hatred between Muslims in the UK and the rest of the population, in time leading to further division and extremism. We MUST not allow this to succeed.
Catherine Sharp, New York/London
Timothy McVeigh, the Oklahoma City bomber, was a US citizen. The issue is not a question of nationality or citizenship but of 'belonging'. Terrorists seem to start as people who are alienated from the society in which they live.
Debbie, Seattle, US
It's very disturbing and upsetting to learn that these vile monsters who were responsible for these horrific attacks were British. I happen to be a British Muslim and I think it is about time for the overwhelming peace loving Muslim majority to take more responsibility to fight and get rid of this irrational, extremist and un-Islamic way of thinking within a small minority.
Kamran, London, UK
To have someone else do these cowardly deeds is bad enough, but to have people from your own country do this only makes it hurt.
Collie, Dublin, Ireland
Let's take out religion and politics, and look at the individuals who do this sort of thing. It's almost as if a certain strata of humanity was born programmed to self destruct, just waiting for a cause and a manipulative influence to set them off.
Chris Clark, London
Like everyone else I've been brought up to value my country, value my nationality and to be protective of both. Somebody somehow brainwashed these people into hating their country. The security services need to find out who, how and why and then stop them.
Alex, Aylesbury, UK
I would have to wonder about their religious beliefs and background before making a judgement. If they are Islamic fundamentalists which happen to be British, nothing changes in the war on terrorism? On the other hand if they are Anglo-Saxon Christians, you Brits definitely have problems to contend with.
Dwayne Chastain, West Jefferson, Ohio
I'm from Leeds. The houses that were searched were about 500m from my house. I am British born and I am Muslim. I truly do not understand the violence and the need for violence that these alleged perpetrators had inside them.
Mohammad Khan, Leeds
Let's get away from any idea that it's 'our fault' for not treating certain sectors of the population fluffily enough. Lots of people feel they might have been short-changed in life: their response may be to get a bit angry, lobby to get things changed, work to make up for circumstances. They don't go round blowing things up. Instead, the message must be: know which side your bread's buttered. This country gives you a healthcare, education, employment opportunities, free speech. The least you can do is not try to destroy it.
Liz, London, UK
Hardly surprising, all over the country everyone has their own views and opinions no matter how radical. However its when they overstep the mark with blatant killing of innocent victims that we need to start taking steps to make sure another July 7th doesn't happen again.
Fraser Hamilton, Lincoln
They may think that they will go to paradise, but I bet they never stopped to think about how the rest of their family members who don't share their hatred and are innocent are now going to suffer public backlash and mental anguish.
Chris, Houston, TX USA
I'm not surprised they were from UK. Concerned but not surprised. All it takes to create a terrorist is hate. We must be asking how someone who has grown up in this country can harbour enough hate to carry out something this extreme. The fact that they must have had their education here, their health care here, their friends here, their life here makes it even more disturbing.
Will, Wokingham, UK
It was chilling to know that these people existed in our communities. The people who go out to kill innocent people don't belong to any faith, religion or any country. They just belong to one group - criminals.
Asim, Leeds, UK
British born or not makes no difference. The verbal and political attacks on Muslims need to stop worldwide if we ever expect to live in peace.
Jennifer, Seattle, USA
The difference between the IRA bombers and this is that there is an obvious injustice that they seek to put right, but with the recent London bombings it is as if people born here have turned against their own country.
A Hargreaves, Blackpool, England
That doesn't sound out of the ordinary. The UK is a more diverse country than the US. As for the implications on the fight against terrorism, none whatsoever. Until the identities of the terrorists are known, it is unclear as to who they were and what the attacks were about.
Richard Wheatley, Melbourne, FL, USA
I'm not surprised that these criminals and extremists were British. Fanaticism knows no borders. And only careful intelligence work by the authorities may prevent future such carnage.
Microchips in passports and identity cards would not have shown these people to be terrorists. A functioning community spirit where they lived might have.
Shaun Smyth, Divonne, France
The fight against religious fanatics of all faiths who turn to terrorism to try and attain their goal is one the world will have to deal with. Islam is not alone in having fanatics who resort to terrorism and other countries have religious fanatics and fundamentalists who could easily turn to terrorism to try and achieve their goals.
Robert Prior, Toronto, Canada (ex-pat)
We've dealt with the threat from "British-born" bombers for years with the Northern Ireland scenario. It probably makes it easier to deal with another potential threat from home-grown terrorists rather than harder. We've had a lot of practice at counter-terrorism and they've chosen the wrong turf to start a fight.
Andy, United Kingdom
It's chilling to think that our education system, our community groups, our media and our multi-cultural society couldn't stop these young men becoming murderous fanatics.
When young men, born in this land, grow up to hate it so much that they would kill innocent citizens, we need to know why.
This doesn't change anything. The IRA bombers were 'British born'. Fanatics will always find a cause. What we need is better community harmony so these people are less able to find reasons to hate their country.
CJ Anderson, Biggin Hill, UK
Well this will put paid to the claims that it's to do with immigration.
Brendan Fernandes, London, UK