The threee KNF-MC militants were killed in a gun battle with activists of newly-formed Kuki group, United Tribal Liberation Army (UTLA), at Lenlong yesterday.
The victims were identified as Paotinlam (27), Sathan (27) and Khupmang (22), reports from the district said adding the motive behind the factional fight is yet to be known.
The main demand of the KNF-MC was to carve out a Kuki state by reorganising Manipur.
Over 450 persons have so far been killed in militancy related crimes in Manipur this year.