A suspected suicide bomber killed at least 43 people in Khar, Pakistan Saturday and wounded many others, authorities in northwestern Pakistan said.

Witnesses say more than 30 people were killed instantly by the explosion when the bomber targeted a crowd of people receiving aid from the World Food Program. The other victims died in a government-run hospital.

The WFP set a facility up there to help families displaced by fighting. A spokesman for the organization said no WFP staff members were injured in the attack. The majority of victims were families identified as internally displaced persons.

Khar lies on the Afghan border and is the administrative center of Pakistan's Bajaur district.

The blast came a day after Taliban insurgents attacked security forces in nearby Mohmand district, leaving 11 soliders and 24 militants dead.

Read more about the bombings here.