Islamabad , Pakistan ( CNN ) -- A suicide car bomber killed at least 56 people and wounded more than 100 others Friday when his vehicle exploded in a market in Mohmand Agency in Pakistan 's tribal region , officials said . The intended target of the attack was a local government office in the town of Eakah . But the vehicle detonated in a market near the building , said Hayat Khan , a local administration official . About 20 shops , five houses and the local jail were damaged in the blast . In the confusion following the attack , various officials provided conflicting death tolls . Amjad Ali Khan , chief of Mohmand Agency , said four policemen were among the dead . Maqsood Mahed Khan , a local government official , said three children and two women were killed . Authorities also believe more victims may be trapped under the rubble of damaged buildings . Mohmand is one of seven semiautonomous tribal agencies along the 1,500-mile border porous border that Pakistan shares with Afghanistan . The Pakistani military has been battling insurgents in the area for some time .
More victims may be trapped under rubble . Attack is carried out by a suicide car bomber . Target is a government building . Mohmand Agency is one of seven semiautonomous regions .