Abu Hamza's son calls for holy war while praying in London mosque in series of jihadist-style videos Uthman Mustafa Kamal has built up a following at the An-Noor mosque Head of London mosque accepted speeches could be used by extremists Kamal is the second-youngest son of notorious hate preacher Abu Hamza Quilliam Foundation: 'One video twists the meaning of the Qur'anic verses' Abu Hamza's son has spoken of his support for holy war at a London mosque and backed a suspected Al Qaeda terrorist who tried to murder U.S. troops in Afghanistan. The hate preacher's second-youngest son Uthman Mustafa Kamal has built up a following at the An-Noor mosque in Acton, west London, and videos show him praying for "mujahids," or holy warriors. Farouq Malik, the An-Noor mosque head, told a newspaper today that Mr Kamal was in fact talking about Muslims fighting "occupying forces" in overseas lands, but admitted that was not made clear. Videos: Uthman Mustafa Kamal has built up a following at the An-Noor mosque in Acton, west London Mr Malik accepted that the speeches on the mosque's official YouTube channel could therefore potentially be used by Islamic extremists, reported the London Evening Standard. Another video by Mr Kamal, including pre-9/11 Jihadist footage, showed him quoting the Koran and telling "believers" to "sell the life of this world for the Hereafter (and) fight in the Cause of Allah." Dr Usama Hasan of counter-extremism group the Quilliam Foundation told the Standard: "This video twists and perverts the meaning of (the Qur'anic verses) by putting a narrow, Jihadist lens on them.' He added that video was similar to 1990s Jihadist videos that preceded Al Qaeda's recruitment films. Speeches: The son of Abu Hamza (left) was also seen at a U.S. embassy demonstration praying for Aafia Siddiqui (right) - one of the most wanted woman in the world before she was convicted of attempted murder Mr Malik admitted that the video should not have been uploaded, insisting that it would be taken down immediately. He blamed it on the person hired by the mosque to upload videos to YouTube. 'This video twists and perverts the meaning of (the Qur'anic verses) by putting a narrow, Jihadist lens on them' Dr Usama Hasan, Quilliam Foundation Another video online showed Mr Kamal at a U.S. embassy demonstration praying for Aafia Siddiqui - one of the most wanted woman in the world before she was convicted of attempted murder. Former shadow defence minister Patrick Mercer told the Standard: "I hope the mosque has looked at the full implications of what this man is saying. The police must monitor this very carefully. Hamza, 54, who used to preach at the Finsbury Park mosque in north London, was jailed for seven years in 2006 for inciting violence during sermons. He is now facing 11 terror charges in the U.S. Mr Kamal declined to comment when approached at his home in west London by a reporter.