Hangu- Two teachers were killed when unknown gunmen opened fire near a government high school in Hangu today. Details have it that the school teachers were on their way to the government high school in Gul Bagh area of Hangu at 7:30 am when armed attackers ambushed them with bullet shots, leaving the two teachers severely injured while the assailants escaped successfully from the scene. The locals shifted the wounded teachers to the District Headquarter Hospital where they succumbed to their injuries. The students and the local residents protested against the killing of the teachers and blocked the main road for a while. They demanded the authorities to arrest the killers. Police have started the investigations.