PESHAWAR - Government Girl High School , Sheikh Mohammadi, was badly damaged when unknown militants blew up it on Thursday with explosive devices in the limits of Badhber Police Station. Police sources said that militants had planted powerful explosive material near a wall of the school, which blew up with a big bang. The blast was so powerful that it was heard across the area and caused fear and panic among the masses. Later, after the blast police and officials of the Bomb Disposal Squad rushed towards the site and collected the evidences. Police registered a case and started investigation. Meanwhile, two persons were killed when some unknown people triggered fire on them in Adezai area limit of Mattani police station here on Thursday. Police sources said that both the persons were on their way to bazaar when the unknown armed people opened firing on them, which resulted in the killing of both the persons on the spot. Police registered FIR and started investigation.