BARA : Militants early on Monday morning blew up a government primary school with explosive device in Khyber Agency . According to security sources, some unidentified militants planted explosive material along the wall of primary school located in Akka Khel area of Bara tehsil in Khyber Agency which went off with a big bang.  There was no casualty as the school was closed. Law-enforcement agency personnel reached the spot and cordoned off the entire area. They started search action for arresting the militants.