New Delhi: TMC leader Kalyan Banerjee had a heated exchange with some of his former party colleagues and NCPI MPs in the Lok Sabha chamber on Wednesday after the House was adjourned following an uproar by the opposition.The Nationalist Citizens Party of India (NCPI) members involved in the exchange included Mitali Bagh, Shatabdi Roy and Kakoli Ghosh Dastidar. Kalyan Banerjee has remained loyal to TMC supremo Mamata Banerjee.It was not clear what led to the heated exchange.Some members of opposition parties intervened and tried to calm down both sides. On being asked what had happened by some of the opposition MPs, Kalyan Banerjee left the House.Bagh, Dastidar and some other NCPI members subsequently went to meet Lok Sabha Speaker Om Birla in his chamber apparently to raise the issue.Sources said Birla asked the NCPI to submit a written complaint.As many as 20 TMC MPs revolted against the party leadership after the party's defeat in the West Bengal assembly elections and joined the NCPI. They started sitting separately, away from the TMC MPs in the Lok Sabha.The NCPI MPs also expressed their allegiance to the ruling NDA and Prime Minister Narendra Modi.