Blasts kill at least 37, wound 700

Thursday, July 7, 2005; Posted: 2:14 p.m. EDT (18:14 GMT)

An intense police hunt is under way in Britain for terrorists behind a string of bombings on London's transport system that killed at least 37 people and wounded 700 early today. Investigators have not yet said whether they believe the bombers left explosives on three trains and a bus or mounted suicide attacks.