RAWALPINDI, Pakistan - Pakistani opposition leader Benazir Bhutto was killed Thursday in a suicide attack as she drove away from a campaign rally attended by thousands of supporters, aides said.

The attacker struck shortly after Bhutto addressed the crowd in the garrison city of Rawalpindi. There were conflicting accounts over the sequence of events. Rehman Malik, Bhutto's security adviser, said Bhutto was shot in the neck and chest by the attacker, who then blew himself up.

Party supporter Chaudry Mohammed Nazir said that two gunshots rang out when Bhutto's vehicle pulled into the main street and then there was a big blast next to her car.