Acting on a tip off, a team of the Rab-7 led by Lt Commander Shamim went to the area and contacted top leaders of a tribal insurgents' group, which deals with arms, in the guise of sophisticated arms buyer in the morning.

As per the deal, Lt Shamim and a Rab man went 'unarmed' to a hilly place at Baghaichhari in the guise of arms buyers at around 3.30pm and told three of the insurgents' group that they need some sophisticated arms like AK-47 on an urgent basis.

At one stage of the conversation, the three, however, doubt them and managed to escape from the scene, leaving a sack containing the AK-47 rifle and bullets, sources said.