"We do not have time to think about a person who does not have any mass base of his own. We have lot of work at hand and that needs to be done at the earliest," said senior TMC leader and mayor of Kolkata Municipal Corporation, Sovan Chatterjee.
Another senior TMC leader and state cabinet member Firhad Hakim advised Mr Roy not to dream about dislodging the TMC government in the next West Bengal Assembly polls as it might turn into a nightmare for him.
"He is a traitor who had betrayed the people of Bengal.
Mr Roy, who was long the second-most powerful leader of the Trinamool Congress, joined the BJP yesterday. He claimed that people of West Bengal wanted an alternative to Chief Minister Mamata Banerjee, and will vote the saffron party to power in the next polls.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)