Kolkata, July 15 -- After switching to the rebel Trinamool Congress camp, veteran leader Madan Mitra on Wednesday said that the TMC was focused on promoting MP Abhishek Banerjee rather than strengthening the organisation.

In a fresh blow to the Mamata Banerjee camp, MLA Mitra resigned from the party and joined the rebel TMC faction led by Leader of the Opposition Ritabrata Banerjee.

Madan Mitra told ANI that he resigned from Mamata Banerjee's TMC as he was unable to work effectively. He said that his concerns went unaddressed by the party leadership.

"I resigned because I was no longer able to work effectively within Mamata Banerjee's TMC. I have stepped down from all the committees I was part of. More and more of Mamata Banerjee's lon...