SWABI/KOHAT, Jan 11: Unidentified militants blew up a primary school for girls in Razaar tehsil of Swabi district in the small hours of Wednesday.

The residents of the area said that the two-room building of the government primary school for girls in Shagai village was badly damaged in the explosion.

Kalu Khan police station SHO Mushtaq Khan said that the incident occurred at about 2am. Police reached the spot soon after the explosion, he added.

Police registered a case against unidentified accused and started investigation.

Meanwhile, three houses were damaged in Ali Abbas area when five mortar shells were fired at Hangu city from an unspecified location on Wednesday.

The mortar shells were fired in a short span of half an hour that caused panic among people of the area.

The bomb disposal squad termed the first blast as a hand grenade explosion but later confirmed that mortar shells were being fired at the city by unidentified terrorists.

Officials said that bomb disposal squad was trying to locate the place from where the mortars were fired but so far no headway had been made in that regard. They said that it would be premature to blame Taliban for the attack.