Politicians and religious leaders from Scotland are among those who have spoken of their sorrow at news of the explosions in London.
JACK McCONNELL, FIRST MINISTER
I had planned today to have a conversation with Ken Livingstone to congratulate him on the success of London yesterday in winning the Olympic Games for 2012.
Instead, I have sent a message of condolence on behalf of the people of Scotland to the people of London and the families of those injured or deceased in the terrorist atrocities we have seen in different locations across central London.
We utterly condemn those atrocities, we condemn those responsible.
We condemn what they stand for and we restate here in Scotland our commitment to democracy, freedom of speech, dialogue, and the actions we want to see taken to create a better world.
ALEX SALMOND, SCOTTISH NATIONAL PARTY
These are terrible and tragic events. I would like to offer my deepest sympathies to the families of those who have died. My thoughts and prayers are with them and all those injured in these brutal attacks.
I have sent a message to London Mayor Ken Livingstone expressing Scotland's solidarity with the people of London today.
Violence solves nothing but creates more violence and the key targets for terrorism are not the heavily protected events like the G8 but ordinary people going about their daily lives.
NICOL STEPHEN, SCOTTISH LIBERAL DEMOCRAT LEADER
These were shocking and shameful attacks. Everyone in Scotland will want to send sympathy and support to those affected by the dreadful carnage.
We should all condemn these atrocities. Random attacks on public transport mean terrorists are deliberately attempting to kill children and people of all colours and creed.
It is difficult to imagine more cowardly or despicable behaviour.
DAVID McLETCHIE, SCOTTISH CONSERVATIVE LEADER
These are evil acts that aim to maim and kill innocent people and break our resolve in the fight against terrorism.
Our thoughts and prayers are with the families and friends of those who have been killed and all those injured in this atrocity.
We fully support the government in its determination to stand up to those who attack our democracy and threaten our very way of life.
These outrages occur on the opening day of the G8 Summit - there could be no starker contrast between those who want to save lives and those who wish to destroy them.
SCOTTISH SOCIALIST PARTY STATEMENT
The SSP sends its condolences to the families of those killed and injured in the bombings in London.
Today's horrific events further expose the falsity of the claims by Tony Blair and George Bush that the wars on Afghanistan and Iraq have turned the world into a safe place.
The world is now darker and more dangerous than ever before. Today's wave of destruction also underlines the futility of trying to defeat terror by ever more repressive legislation.
The most effective way Tony Blair could now take to make the UK a safer place is to pull all British troops out of Iraq.
BRIAN SWEENEY, CHIEF OFFICER, STRATHCLYDE FIRE & RESCUE, MESSAGE TO KEN KNIGHT, FIRE COMMISSIONER FOR LONDON
Sorry to hear about today's events. It will doubtless be a difficult challenge for both you and your team.
We all have complete confidence that you will meet the challenge head-on and if we can offer any assistance, just let me know.
CHIEF CONSTABLE PETER WILSON, HEAD OF G8 POLICE CO-ORDINATION CENTRE
We are working with so many officers from
England and Wales, the trauma feels more real to us than had it not been that we were working so closely with fellow officers.
Our thoughts immediately turn to those who were caught up in it, whether as the victims, witnesses, families, responding emergency services or whoever may have found themselves facing a day of trauma, concern and, for some, absolute disaster.
MODERATOR OF THE CHURCH OF SCOTLAND, THE RIGHT REVEREND DAVID LACY, AND CONVENER OF THE KIRK'S CHURCH AND SOCIETY COUNCIL, MRS MORAG MYLNE
There are no words sufficient ever to speak of the kind of horror visited on London this morning. The immediate reaction of shock and distress turns quickly to sympathy and grief for the bereaved and injured.
This is a time to know that God suffers with the attacked and the oppressed. That is where our concentration, our presence and our prayers must be.
Our prayer today is for comfort for those who are hurt, strength for those whose duties are to rescue and to treat, and peace for the city and all its people.
As we as a nation seek to come to terms with an attack on our freedoms and our democracy, it is to those principles that we must hold. Our reaction must be to strengthen and uphold what terrorism seeks to destroy.
CARDINAL KEITH O'BRIEN, SCOTLAND'S CATHOLIC CHURCH
On behalf of my brother Bishops and myself I send deepest sympathies to all those affected by these appalling terrorist attacks together with the promise of our thoughts and prayers at this traumatic time.
Like everyone else I am deeply shocked at the scenes of violence, panic and confusion unfolding before our eyes today.
I have written to the Prime Minister, Tony Blair and the president of the Bishops' Conference of England and Wales, Cardinal Cormac Murphy O'Connor, assuring them of the support and sympathy of the Catholic community in Scotland.
LIZ CAMERON, LORD PROVOST OF GLASGOW
I am sure I speak on behalf of the people of Glasgow in expressing my deep shock and sorrow at the devastating terrorist events which have created carnage across central London.
Our thoughts and prayers are with the friends and families of all of those affected on what is truly a dark day for the capital.
OSAMA SAEED, SCOTTISH SPOKESMAN, THE MUSLIM ASSOCIATION OF BRITAIN
Our prayers go immediately to those who have suffered and died in today's outrage, along with their friends and families.
If as is being indicated, Muslims were behind these heinous acts, they should know that this has nothing to do with the religion of Islam which holds the sanctity of life as paramount. Nothing can justify the harming of innocents.
With this being so close to home, Muslims have been advising the community not to venture outdoors in the immediate aftermath of this atrocity for fear of reprisals which have been felt after previous attacks abroad.
GORDON MCCORMACK, DIRECTOR, SPECIAL OLYMPICS 2005 GLASGOW GREAT BRITAIN
We have asked that all of the athletes, coaches, friends and supporters show their support for the people of London at this most terrible of times.
These games show the very best in human nature and endeavour and we wish to express our collective sympathy for everyone involved.
ROBIN HARPER AND SHIONA BAIRD, CO-CONVENERS OF THE SCOTTISH GREEN PARTY
On behalf of the Green MSPs and all our members we would like to express our sympathy to the friends and relatives of those killed and those hurt in the appalling outrage carried out in London.
Whoever is behind this, we utterly condemn it.
Violence can never be the answer - we must learn to resolve conflicts through mediation and peaceful means.
This act of terrorist violence must not be allowed to divert the G8 conference from attempting to create a fairer and more peaceful world.
Once again, our hearts go out to all those injured and all those bereaved in the London bombings.