The developments emerged as Charles Clarke, the British home secretary, offered the first official indication that British officials believed the four attackers were suicide bombers.

• 英国内政大臣查尔斯·克拉克发布了第一份官方声明,表明英国官方相信那四名袭击者是自杀性炸弹袭击者。事情由此有了发展。