The Forward Bloc, a key constituent of the Left Front in Tripura, on Friday quit the ruling alliance after being denied three seats by major partner Communist Party of India-Marxist for next month's assembly elections in the state.

"We are no longer in the Left Front. We left it because of the autocratic functioning of the CPI-M, which had virtually established one-party rule within the Front," Forward Bloc state secretary Shymal Roy said.

The CPI-M should no longer call the ruling coalition a Left Front as it now only comprised with the CPI-M, CPI and Revolutionary Socialist Party, he said.

"They can call it a three party alliance," he said.

The Forward Bloc, which has no legislator in the outgoing assembly, had demanded that it be given three seats to contest the next month's polls.

The CPI-M had, however, dismissed the demand and said only one seat would be given to the FB.

The Forward Bloc had then said it would contest 15 seats and if its demand was not met, it would think whether to continue in the Front.

The CPI-M had, however, not relented.

CPI-M Member of Parliament Khagen Das, when asked if the Left Front continued to exist, replied that it did.

"The Left Front in Tripura has not broken up. The CPI-M, CPI and RSP are there, only the Forward Bloc has left," Das said.

Tripura has a 60-member House.