Two BSF jawans guarding the ongoing border fencing work were on Friday killed in an ambush by suspected National Liberation Front of Tripura insurgents at Ratiacherra, a remote tribal hamlet in Dhalai district bordering Bangladesh.

A group of BSF jawans were patrolling on foot at Ratiacherra village bordering the Chittagong Hill Tract of Bangladesh. They were providing security to a construction company erecting barbed wire fencing when a group of ultras suddenly opened fire at them, DIG, BSF, A.K. Singh said.

“The ultras also threw grenades at the jawans and injured two of them. The jawans retaliated by opening fire and the ultras fled to Bangladesh,” he said.

The injured jawans, identified as Bajrangi and Arup Das, succumbed to injuries on the way to Agartala Medical College and Hospital.

Mr. Singh said it was suspected that some ultras were also injured but it could not be immediately known.

BSF and Tripura State Rifles have launched a combing operation in the area.