The BBC reports:
Four suspected bombers died in last week's terror blasts in London, police said tonight. Investigations were focusing on the activities before Thursday of four men, three from West Yorkshire. The homes of three from West Yorkshire were raided today, he said. One man was arrested and was being brought to London. CCTV footage showed the four had arrived in London on Thursday morning.
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An arrest has been made in Yorkshire after the identity of the suspected London bus bomber led police to make a series of raids. Security sources said the bus bomb suspect died in the blast but it is unclear if it was a suicide bombing. They believe the four bombers were British born and all died in Thursday's bombings.