NDFB(S) engineered the massacre of 81 persons last December in the state.
One 7.65 mm pistol, two hand grenades and a large quantity of ammunition and other war-like stores were seized during the operation conducted by the troops of Army's Red Horns Division and Assam Police, a defence release said.
One of the apprehended insurgents was identified as Ringsar Basumatary who was allegedly involved in the kidnapping of a businessman in March/April 2013 and other cases of extortion.
