A BSF jawan was killed and another critically injured in an ambush by insurgents at Ratiacherra, a remote tribal hamlet in Tripura's Dhalai district bordering Bangladesh, on Friday.
DIG, Police Control, Mr Nepal Das said BSF jawans were patrolling on foot at Ratiacherra village bordering Chittagong Hill Tract of Bangladesh when an IED was blasted by the ultras hiding in the jungle on the roadside.
The ultras also opened fire injuring two of the jawans.
The jawans retaliated and a 15-minute-long encounter followed but the ultras managed to flee, he said.
One of the injured jawans, identified as Braja Lal Rangi succumbed to his injuries on way to Agartala Medical College and Hospital and the other is critically injured, he said.
A massive combing operation has been launched in the area to flush out the insurgents, who, it is apprehended, may have sneaked into Bangladesh, BSF said.