Police said Abu Syed and his wife, brought to Dimapur yesterday, who lured people to invest money to get that doubled, used to repay in genuine currency initially to gain their confidence.
They lured more people to fall in the trap and when the volume of the invested money was high, they returned fake currency and fled the area.
They conducted similar operations in Assam, Manipur, Meghalaya and Arunachal Pradesh besides Nagaland. The matter was brought to the notice of the police two years ago when a man complained of losing Rs ten lakh. Since then the duo were hiding before being caught from Lakhimpur in Assam, Dimapur SP Liremo Lotha told newsmen.