PESHAWAR - Unknown militants blew up another boys primary school in Balarzai area of Badahbera in the outskirt of Peshawar on Saturday night. Police sources said that militants had planted two explosive devices near Mustafa Govt Primary School in Balarzai area of Badhabera. The attack resulted in damage to one portion of the school while one explosive device was found by the police unexploded. The blast caused severe fear and panic in the area as the dwellers considered it major sabotaging activity due to its intensity as the sound was heard across the area. Soon after the blast police and bomb disposal squad rushed toward the site and cordoned off the area. They search the area and recovered another unexploded device which was also planted to completely destroy the school premises. Bomb disposal squad defused the improvised explosive device. According to police the device weighed about six kilogram. Police registered FIR against unknown persons and started search operation in the area. It is mentioned here that the trend of blowing up the schools by the militants in Peshawar is increasing day by day as only in the last two months militants had blown up seven primary and middle schools.