Meanwhile, London police on Saturday charged suspected July 21 bomber Yassin Hassan Omar with conspiracy to murder passengers on the London transport system and possession of an explosive substance. Omar, 24, who was arrested in Birmingham on July 26, is the first of the four suspected bombers to be charged in Britain.
Britain's chief legal official, Lord Chancellor Charles Falconer, said the deadly attacks in London on July 7 showed the government must act against people "who are encouraging young men who are becoming suicide bombers."
"I think there is a very widespread sense in the country subsequent to July 7 that things have changed. A new balance needs to be struck. It needs to be a lawful balance but it needs to be an effective balance," he told British Broadcasting Corp. radio.
A British Muslim group called the Islamic Forum Europe warned the measures could jeopardize national unity in Britain.
"If these proposed measures are allowed to see the light of day, they will increase tensions and alienate communities. The measures are counterproductive and will encourage more radicalization," said forum President Musleh Faradhi. "Many Muslims will perceive our prime minister as playing into the hands of the terrorists."
He also criticized the government's plans to ban Hizb ut-Tahrir, a radical Islamic group that calls for the formation of an Islamic caliphate and is banned in several countries in Central Asia. Supporters insist it is a nonviolent group persecuted by corrupt governments.
On Friday, the prime minister announced proposals to deport foreign nationals who glorify acts of terror, bar radicals from entering Britain, close down mosques linked to extremism, ban certain Islamic groups and, if necessary, amend human rights laws.
"Proscribing it will be counterproductive," said Faradhi. "It will give a green light to despotic leaders in the Muslim world to silence political dissenters."
Clerics who preach hate and Web sites or book shops that sponsor violence would be targeted. Foreign nationals could be deported under the new measures.
Since the bombings on three subway trains and a bus, which killed 52 people and four suspected suicide attackers, Blair's government has been trying to build support among political opponents and Muslim leaders for new anti-terrorism legislation.
But the government's new plans appear to have cracked the spirit of consensus.
Liberal Democrat leader Charles Kennedy warned the measures could alienate the law abiding majority of Britain's 1.8 million Muslims and inflame tensions.
"A fundamental duty, a responsibility on all of us, whether government or nongovernment, is to uphold the rule of law and the safety of the citizen," he said. "But alongside that, of course, is to uphold civil liberties and the right to free speech. It is getting that balance right that will be very important ...," he told BBC radio.
The announcement came a day afterblamed Blair for the London bombings and warned that more destruction lay ahead for Britain and the United States.
Blair said his government was prepared to amend human rights legislation if necessary if legal challenges arose from the new deportation measures.