ISLAMABAD, Pakistan - Scotland Yard investigators have concluded that opposition leader Benazir Bhutto died as result of a bomb blast not gunshot in a Dec. 27 suicide attack, supporting the Pakistani government's version of how she was killed, a summary of their report released Friday said.

British Home Office pathologist, Dr Nathaniel Cary, was quoted as saying that, "the only tenable cause" for the former prime minister's fatal head injury was the impact of the blast that went off as she waved to supporters from the hatch of her vehicle after addressing an election rally in the northern city of Rawalpindi.

"In my opinion Mohtarma Benazir Bhutto died as a result of a severe head injury sustained as a consequence of the bomb-blast and due to head impact somewhere in the escape hatch of the vehicle," Cary said in the report, released by the British High Commission in Islamabad.