“These evil deeds makes victims of us all,” the Muslim Council of Britain said in a statement.
“The evil people who planned and carried out these series of explosions in London want to demoralise us as a nation and divide us as a people. All of us must unite in helping the police to capture these murderers.”
Mohammed Naseem, chairman of the Central Mosque in the central city of Birmingham, which has a substantial Muslim population, said: “We are shocked and condemn without reservation this horrendous atrocity.”
But he urged the government not to foster a “climate of suspicion” towards Muslims.
Massoud Shadjareh, chairman of the Islamic Human Rights Commission, appealed for calm while also condemning the bombings.
“The Islamic Human Rights Commission utterly condemns this attack, but now we appeal that there should be no further victims as a result of reprisals,” Mr Shadjareh said, adding he was “very concerned about a backlash” against British Muslims.
He said some members of the Muslim community suffered a backlash following the September 11 2001 terror attacks in the United States, and the Madrid train bombing in March 2004.
A previously unknown group calling itself the Organisation of Al-Qaeda Jihad in Europe claimed responsibility for the London attacks on a website which were “in response to the massacres carried out by Britain in Iraq and Afghanistan.”
The claim has not yet been verified.
But British Foreign Secretary Jack Straw said the attacks appeared to be the work of Osama bin Laden’s al-Qaeda network.
The British branch of the Sunni Muslim organisation, which seeks to build an Islamic state in Central Asia, told British Muslims to beware of revenge attacks after the blasts.
“It is possible in the days ahead that symbols of the Muslim community such as mosques and schools may be targets for vandalism,” it said.
Meanwhile, the Australian Muslim Civil Rights Advocacy Network (AMCRAN) also condemned the attacks.
“Such attacks are barbaric and totally inconsistent with any kind of civil tradition, whether it be secular or religious,” AMCRAN co-convenor Dr Waleed Kadous, said in a press statement.
“Regardless of who committed these acts, we unequivocally and unambiguously condemn these attacks.”
The Islamic Friendship Association of Australia also condemned the attacks.
“Attacks against civilians can never be justified. These blasts are cowardly criminal acts of terrorism and murder,” the association’s found, Keysar Trad, said.
“My deepest and most heartfelt sympathies and condolences go to the victims of the London blasts and to their families,” he said in a statement.