Commandos, attached to Thoubal district police, launched a manhunt at Thoubal Wangmataba area yesterday following reports of infiltration and movement of insurgents.
During the search operation, three KYKL members identified as P Boynao (21), S Aboicha (20) and N Sanathoi (18) were arrested, the sources said.
Official sources said over 100 militants of various outfits have so far been arrested in the state this year so far.