Unidentified gunmen blew up a government primary school in northwest Pakistan today. last night, gunmen had planted explosives in a government primary schools for boys in Lakki Marwat district in Khyber- Pakhtunkhwa province of Pakistan and blew them up in the early hours of this morning, damaging part of the school building, according to Pakistani police. The gunmen had detonated three government primary schools for boys in various regions of Lakki Marwat district just two days ago.