The Center may sign a tripartite agreement with all factions of the National Democratic Front of Bodoland (NDFB) on January 27.

Senior leaders of the rebel outfit, who have been camping in Delhi since Thursday, held informal meetings with Centre's interlocutor AB Mathur and officials of the Ministry of Home Affairs in New Delhi on Friday.

"We hope the negotiations will be completed by January 26 and the agreement will signed in the next one or two days," a top leader of the Gobinda Basumatary-led NDFB (Progressive) said.

On Thursday, all central committee members of B Saoraigwra-led NDFB (S), including the wanted rebel leader G Bidai, reached national capital for negotiations with the Centre. The National Investigation Agency (NIA) has placed G Bidai on its most-wanted list.