Tony Blair has been urged to change UK foreign policy by a group of senior British Muslims.
In an open letter, they argue that current government policy encourages extremism and may put British citizens at risk of attack, both in the UK and abroad.
The letter also encourages Mr Blair to step up efforts to bring an end to the violence in the Middle East.
The letter appears as a full-page advert in some of Saturday’s national newspapers.
The 38 Muslim groups which signed the letter include the Muslim Council of Britain, the Muslim Association of Britain, the British Muslim Forum, the British Muslim Forum and the Muslim Solidarity Committee.