"We would not join BJP (Bharatiya Janata Party). We are seriously keen to build an "anti-Left maha jot" to oust the ruling Left Front in Tripura in next year's assembly elections," Trinamool Congress (TMC) main leader in Tripura, Sudip Roy Barman, said.
Addressing the party workers and leaders, Mr Barman said the BJP on its own has no capability to win a single seat in Tripura.
Mr Barman's announcement came amidst reports of many leaders and workers of parties, including the Trinamool, joining the BJP during the past several months.
The TMC's Tripura unit former president and a former minister and ex-President of the Tripura Pradesh Congress Committee, Surajit Datta, and TMC's Tripura unit coordination committee chairman Ratan Chakraborty and 15 other state committee members joined the BJP last month.
Surajit Datta, a five-time Congress legislator, and Ratan Chakraborty, who was a minister in the Congress government (1988-1993), joined the TMC many years ago and shaped the party in the Left-ruled state.
TMC supremo and West Bengal Chief Minister Mamata Banerjee last week in an interview to a Kolkata-based television channel indicated that Sudip Barman and other party MLAs of Tripura went to Delhi to meet central BJP leaders.
Mr Barman however denied Banerjee's observations and said that they went to Delhi to meet Prime Minister Narendra Modi to apprise him about certain issues of Tripura, including chit fund related matters. PM Modi, however, did not meet the TMC leaders and legislators.
Mr Barman along with five MLAs and a large number of leaders and workers had quit the Congress and joined the TMC, opposing the Congress' alliance with the Left in the West Bengal Assembly elections last year.
He was accompanied by TMC's Tripura unit President Ashish Saha and other party leaders, said that Trinamool Congress is the real opposition party and unlike the BJP had organised a series of movements against the Left Front government.
"BJP has huge money. To get money and benefits, some people are joining that party. Without TMC no party in the state will be able to defeat the Left in Tripura," Mr Barman said.
His comments came as BJP's state president Biplab Kumar Deb held a closed door meeting with TMC MLA and the party's prominent leader in northern Tripura, Biswabandhu Sen.
He later termed the meeting as a "courtesy meet".
The 60-seat Tripura assembly elections are likely in February next year along with Nagaland and Meghalaya.