Islamabad , Pakistan ( CNN ) -- Separate blasts rocked three schools in Pakistan 's troubled northwest early Friday morning , authorities said . One of the explosions at a school on the outskirts of Peshawar destroyed a wall , said Sahibzada Anis , Peshawar 's administrative chief . No injuries were reported . Two other bombs were set up outside a school in the Khyber Agency of Pakistan 's semiautonomous tribal areas , according to Azam Jan , a senior local administration official . One blew up and damaged a wall while the other was defused by local officials . A third school was hit in the same area , and the attack destroyed the wall of the compound but not the buildings , Jan said . Peshawar , the capital of the Northwest Frontier Province , is at the core of Pakistan 's war on terror . The military has launched multiple offensives targeting homegrown militants , sparking a retaliation . Since October , the city has been the target of a series of attacks launched by militants to revenge a major Army offensive to root out the Taliban . A truck bomb in a popular market killed over 100 people in October and government and security forces have suffered regular attacks . Journalist Umar Aziz Khan contributed to this report .
Three schools in Pakistan 's troubled northwest targeted by bomb blasts . One bomb planted at school on outskirts of Peshawar . Blasts caused damage to walls but no injuries are reported .