Sonitpur superintendent of police Sanjukta Parashar told PTI the encounter took place when a joint team of police, CRPF-Cobra battalion and Army were conducting a search operation for NDFB(S) cadres at Mainaoshree Paharpur.
When the forces approached an NDFB(S) camp where a group of militants were hiding, there was an exchange of fire in which three insurgents were killed on the spot and four others fled to the dense forest, she said.
The security forces destroyed the extremists' camp, Parashar said, adding the slain militants were identified as NDFB(S) 'platoon commander' Raikhoo, 'section commander' Gothal and another named Aranga, the SP said.
Police said three pistols, two grenades, eight rounds of ammunition and five mobile handsets were recovered from the slain militants.
NDFB-S had gunned down 14 people and injured over 20 others at Balajan in Assam's Kokrajhar district on August 5 and killed a couple in Chirang district in the early hours of August 18.
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