'We have managed to escape from our camps in Sylhet district after Bangladesh launched anti-insurgency operations in different parts of that country. Some more guerrillas may sneak into Tripura any time from across the border,' Debbarma told the BSF officials.

With this, about 200 tribal guerrillas of ATTF and National Liberation Front of Tripura (NLFT), including some dreaded ultras carrying rewards of Rs.250,000 each and having Interpol arrest warrants, have fled from their Bangladeshi camps and surrendered to Indian security forces during the past one year.

The ATTF and the NLFT had been demanding independence for the indigenous tribals and secession of Tripura from India.