Kolkata, June 7 -- TMC chief Mamata Banerjee on Sunday left for Delhi to take part in the INDIA bloc meeting scheduled for June 8.

TMC leaders Dola Sen and Kalyan Banerjee were also present at the Kolkata airport.

This is the first meeting of the INDIA bloc after the Trinamool Congress lost the West Bengal assembly polls.

The meeting is crucial for the opposition grouping not only due to the challenge posed by the growing political dominance of BJP but also due to the differences within.

DMK, which has been a staunch pillar of the INDIA Bloc, has decided not to participate in the meeting over "betrayal" by Congress in Tamil Nadu which decided to back the Tamilaga Vettri Kazhagam (TVK) after the elections.

Congress contested the polls...