Video : VLOGZTV

Dec. 27 -- Pakistani opposition leader Benazir Bhutto was assassinated Thursday after a campaign rally, sparking widespread riots and raising new concerns about the stability of this nuclear-armed nation of 165 million people.

n an outpouring of grief and rage that followed the attack, which also claimed the lives of at least 20 other people, Bhutto supporters smashed glass at the hospital where she died and rioted in the teeming port city of Karachi, where vehicles and a gas station were burned and police came under gunfire. At least five people were killed in riots across the country, police reported.

Pakistani President Pervez Musharraf blamed Islamic extremists for the assassination, but some angry Bhutto supporters held Musharraf responsible.