Acting on a tip-off, a joint team of the army and police launched an operation at Bhelughat area of the district and were engaged in an encounter with a group of KPLT militants in which the top militant of the outfit was killed, a defence spokesman said.
The militant was identified as Seme Kro. The security forces recovered a 7.65 mm pistol with magazine, one live round of ammunition and some documents from the spot.
In another operation, yet another joint team of army and police apprehended a National Santhal Liberation Army (NSLA) militant from Silaimatha in Kokrajhar district, the spokesman added.