Some unknown terrorists destroyed a government high school here in Nowshera on Wednesday, police said. According to details, two rooms were destroyed in the blast caused by previously planted explosives in the school while no casualties were reported in the blast. After the incident, the police arrested the school's watchman and begun investigations. Police also cordoned off the area and started search operation. This is now the fifth school (in a row) that has been targeted by terrorists this year in Nowshera.