It is suspected that the incident was a fallout of rivalry between two hill-based militant outfits, he said.
The incident occurred at Khoupam area, about 90 km from the capital Imphal town.
On August 7 last, one NSCN (IM) cadre was shot dead at Khumji area in Noney district. The ZUF had later claimed responsibility for gunning down the member of its rival outfit.
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