The Assam Rifles recovered a 9mm pistol with magazine, 12 rounds of 7.62 mm ammunition and one magazine M-16 Rifle from the district.
Acting on intelligence reports, security agencies were alerted with a threat of insurgents from Myanmar planning terror acts in the poll-bound state.
Reports said an insurgent group based in Myanmar was trying to carry out terror attacks in Manipur in coordination with Northeast-based militant outfits.