New evidence suggests four suicide bombers, including at least three Britons of Pakistani descent, carried out the terror attacks in London, officials said. Surveillance cameras captured the men as they arrived in the capital 20 minutes before the explosions began. Police raided six homes in Leeds Tuesday searching for explosives and computer files that would shed more light on what were believed to be the first suicide bombings in Western Europe. They arrested a man, identified by the British news agency Press Association as a relative of one of the suspected bombers. A town councilor told The Associated Press that at least three of the presumed suicide bombers were British citizens of Pakistani ancestry. One was thought to be Shahzad Tanweer, a 22-year-old cricket-loving sports science graduate, and another was a teenager, Press Association reported. On its Web site, The Times newspaper named Tanweer, as well as Leeds residents Hasib Hussain, 19, and Mohammed Sidique Khan, the 30-year-old father of an 8-month-old baby. The newspaper said police were still trying to identify the fourth bomber. Without citing sources, the Times said the mastermind behind the attacks as well as the bomb maker were still thought to be at large. Police found a "bomb factory" during the Leeds raids, the newspaper said. Police did not identify the four suspects.
