LONDON, July 17 (Xinhuanet) -- British police Saturday night released a picture of the four London bombers being together as they set off on their deadly mission last week.

    A security camera captured the four men entering Luton railway station, just outside London, at 0721 local time (0621 GMT) on July 7 on their way to the capital.

    In the photograph, the four men were dressed casually and appearing relaxed, with backpacks on their shoulders, which are thought to contain the bombs which tore through London's transport system, killing at least 55 people.

    Three of the bombers were young British Muslims of Pakistani origin, while the fourth was a Jamaican-born Briton. Two of them were teenagers, while the other two were 22 and 30 respectively.

    Authorities in Pakistan say they are placing Islamic religious schools under closer scrutiny, after reports that one of the bombers attended one last year.

    The picture was released in an attempt to find out more about their final movements, the BBC quoted London Metropolitan Police as saying on Sunday.

    Police have taken more than 800 witness statements and received3,500 calls to the anti-terrorist hotline

    The wreckage of the bombed number 30 bus has been moved from Tavistock Square in central London for further forensic examination.

    British Prime Minister Tony Blair said Saturday that it was time to stand up to the "evil ideology" behind the London bombings and other attacks.

    The Sunday Times reported that one of the four suicide terrorists was scrutinized by the British Security Service, or M15, last year, but was judged not to be a threat to national security.

    British police are now searching for those who may have helped the bombers carry out the attacks.

    One house being searched in Leeds, the city where three bomberswere from, is linked to Egyptian biochemist Magdi Mahmoud al-Nashar, 33, who was arrested in Cairo as part of the inquiry into the bombings.

    He has denied any involvement in the fatal attacks in London.

    Earlier, Egyptian Interior Minister Habib el Adli said press reports linking al-Nashar to al-Qaida were "groundless" and based on a hasty conclusion. Enditem