Leeds, England, July 13, SPA -- New evidence suggests four suicidebombers, including at least three Britons of Pakistanidescent, 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 forexplosives and computer files that would shed more light onwhat were believed to be the first suicide bombings inWestern Europe. They arrested a man, identified by theBritish news agency Press Association as a relative of oneof the suspected bombers. A town councilor told The Associated Press that at leastthree of the presumed suicide bombers were British citizensof Pakistani ancestry. One was thought to be Shahzad Tanweer, a 22-year-oldcricket-loving sports science graduate, and another was ateenager, Press Association reported. On its Web site, The Times newspaper named Tanweer, aswell as Leeds residents Hasib Hussain, 19, and MohammedSidique Khan, the 30-year-old father of an 8-month-oldbaby. The newspaper said police were still trying toidentify the fourth bomber. Without citing sources, the Times said the mastermindbehind the attacks as well as the bomb maker were stillthought to be at large. Police found a "bomb factory" during the Leeds raids, the newspaper said. Police did not identify the four suspects.--SPA1202 Local Time 0902 GMT www.spa.gov.sa/276542