Pakistan People 's Party died after hitting head on car 's sunroof , U.S. government says . Raja also accused the government of a `` total security lapse . '' Former prime minister earlier said to have died from bomb shrapnel or bullets . Benazir Bhutto official says government explanations are `` pack of lies '' Pakistan official names Pakistan People 's Party leader as suspected plotter .
Pakistan People 's Party died after hitting head on car 's sunroof , U.S. government says . Former prime minister earlier said to have died from bomb shrapnel or bullets . Benazir Bhutto official says government explanations are `` pack of lies '' Pakistan official names Pakistan People 's Party leader as suspected plotter .