Four security personnel, including an officer, have died during an encounter with terrorists in Jammu and Kashmir's Kupwara district today. Sources say a terrorist, who was presumed dead, emerged from the rubble of a destroyed house and started firing which took the security personnel by surprise. Officials sources say an Inspector of the Central Reserve Police Force or CRPF, a jawan and two policemen of the J&K Police died after firing resumed during an anti-terrorism operation in Kralgund village of Langate area of the district.