(CNN) -- The death toll climbed to 93 on Saturday after asuicide car bomb exploded Friday in the middle of a group of men playing volleyball in northwest Pakistan, police said.

Thirty-four others who were injured in the attack remained hospitalized Saturday,said Mohammed Ayub Khan, police chief of the Lakki Marwat district.Those killed included at least six children, and most of the othervictims were teenagers who were watching the volleyball game, he added.People who lived near the volleyball court also were among thecasualties.
The attack happened in a residential neighborhood in the village of Shah Hassan Khel -- also called Lakki Marwat -- inPakistan's North West Frontier Province, said district police officerAsmat Ullah. The village is about 16 kilometers (10 miles) south of the district capital.
Eight houses in the neighborhood collapsed, and the blast was felt 11 miles (18 kilometers) away, the police chief said.
Volleyballis a popular sport in the area, and more than 200 people were watchingthe game when the bomb went off, the chief said.
Authorities thought a pickup was loaded with more than 600 pounds of explosives (300 kilograms), Khan said.
The area used to be a hub for militants before the military flushed them out about two months ago, the chief said. Since then, militants have been threatening the community, Mushtaq Marwatt, a member of a localpeace committee, said on a local TV channel.
The region is near the rugged border with Afghanistan. The border areahas been the scene of heavy fighting between Pakistani military forcesand the Taliban, the Islamic militia that also is battling U.S. forces in Afghanistan.