Pakistan's president has urged Britain to do more to tackle its own militancy threat following the London bombings.
Musharraf said publication of all "hate material" would be banned
Pervez Musharraf was speaking in an address to the nation in which he defended his crackdown on extremists.
He said the London bombers "cannot be called human beings" and said Pakistan stood with the UK in fighting terror.
He also called for Pakistanis to join a holy war on extremists and announced all religious schools would have to register with the government.
A total of 56 people died in the London bombings and at least two of the bombers visited Pakistan last year. The family of one said he visited a religious school, or madrassa.
President Musharraf said Pakistan and Britain stood together in the fight against terrorism.
"I would like to send a message to Prime Minister Tony Blair and his government that we strongly condemn this act of terrorism in London.
MUSHARRAF'S NEW MEASURES
Banned groups not allowed to operate under new names
No public displays of unauthorised weapons
Clampdown on inflammatory material, including audio, video tapes and their publishers and distributors
Militant groups not allowed to collect funds
Monitoring hate sermons from mosques
All madrassas registered by December 2005
"We are together in the fight against terrorism, we need to remain together and fight it together," he said.
However, he said that although three of the bombers may have been of Pakistani descent they had been born, bred and educated in England.
He also pointed to the background of the fourth bomber.
He said he did not know if three bombers were indoctrinated in Pakistan, but asked: "Where did the Jamaican get indoctrinated?"
He added: "There are extremist organisations in the United Kingdom - there is the Hizbul Tahreer and al-Muhajiroun - who operate with full impunity in that area.
"They had the audacity of passing an edict against my life and yet they operate with impunity.
Students in Lahore protest at the latest crackdown
"There is a lot to be done by Pakistan and a lot to be done in England also," the president said.
He called on the Pakistani people to fight militancy.
"I urge you, my nation, to stand up and wage a jihad against extremism and to stand up against those who spread hatred and chaos in the society."
He said all religious schools would have to register with the state by December and he would found a new government department to deal with the madrassas.
President Musharraf said banned militant groups would not be allowed to reorganise under new names.
During previous crackdowns in 2000 and 2002 banned groups reemerged with new names.
The president also said the publication of all "hate material" would be banned.
This latest crackdown saw more arrests during overnight raids at Islamic schools, or madrassas, in cities in Punjab and Sindh provinces, and a number of publications said to be promoting religious extremism have been banned.
A senior security official told the BBC investigators had carried out a complete check on all those detained in the past week and none of them is wanted in connection with the London bombings of 7 July.
It denied reports a key British Muslim al-Qaeda suspect, Haroon Rashid Aswad, was arrested.
The crackdown has caused concern among hardline Islamist parties and human rights groups.
The six-party hardline Islamist alliance, the Muttahida Majlis-e-Amal, has called for nationwide protests on Friday "to condemn the global conspiracy against Islam".
And Asma Jehangir, of the Human Rights Commission of Pakistan, warned: "The government should proceed according to the law in the crackdown."