New Delhi, August 19A BSF head constable was killed in an encounter with suspected NLFT militants near the India-Bangladesh border in north Tripura’s Kanchanpur sub-division on Friday, officials said.Grijesh Kumar Uddey of the BSF’s 145 Battalion suffered bullet injuries in the gunfight. He was airlifted to Agartala, but succumbed to his injuries, they said. A BSF team was on an area domination operation in the Sima-II border outpost area when the firing started from Jupui area in Bangladesh’s Rangamati Hill district, SP Kiran Kumar K said.BSF troops retaliated following which insurgents of the National Liberation Front of Tripura (NLFT) fled under cover of dense forest.