ISLAMABAD, Pakistan (CNN) -- A car bomb killed 37 people and wounded 93 Saturday in northern Pakistan when it exploded in front of an election office of the opposition Pakistan People's Party, the Pakistani Interior Ministry said.

The bombing comes two days before Pakistan's much-delayed parliamentary elections.

Some of those killed were workers for the PPP, which opposition leader and former Prime Minister Benazir Bhutto led before her assassination in December.

The blast occurred in Parachinar as a PPP rally was ending and people were gathering for refreshments, said retired Brig. Gen. Javed Iqbal Cheema, an Interior Ministry spokesman.

PPP parliamentary candidate Riaz Hussein was using the office, according to party spokesman Nazir Dhoki. No one has claimed responsibility for the attack.

A series of other blasts rocked Pakistan's northwest tribal region Saturday. Injuries were reported but no deaths.

Pakistani voters are to go to the polls Monday to choose a new parliament in an election delayed, first by an emergency declaration in early November, then by Bhutto's slaying.

http://www.cnn.com/2008/WORLD/asiapcf/02/16/pakistan/index.html