The death toll from the suicide bomb attack Friday against Shaukat Aziz, meanwhile, rose to eight, with about three dozen injured, Information Minister Sheikh Rashid Ahmed said. Among those killed was Aziz's driver, who had not yet closed the bulletproof door on the car when a man approached and detonated a bomb.

Pakistani television showed gruesome video of the bombing, with the camera capturing an image of the suicide attacker approaching the driver's door, raising his hand and then blowing up. It was not clear if he was signaling to someone.

The attacker, whose head was found not far from the blast site, appeared to be a Pakistani man in his early 20s, said Capt. Zubair Ahmad, a local police official. But government officials were quick to point the finger at international terrorism, which has worked with homegrown Pakistani extremists in the past.

"al-Qaeda may be behind it," Ahmed told The Associated Press, before adding that there is no hard evidence linking the group to the attack.

President Gen. Pervez Musharraf has said he believes al-Qaeda was involved in two attempts to kill him in December, the last of which killed 17 people. He was unharmed.