Chief Judicial Magistrate of West Tripura district remanded the militants, including it's 'army chief' Abdur Rahaman to five-day police custody yesterday.
The wife of Rahaman was also arrested along with the militants on Saturday while moving suspiciously at Nagerjala bus stand.
Four mobile handsets and Rs 50,000 in cash were found from their possession, police said.
During interrogation, the militants admitted that they had gone to Bangladesh in March this year and crossed over to Tripura to enter into Manipur, the police said.
A special interrogation team from Manipur would reach here soon, they added.