"Kapil Krishna Thakur today came to our hospital at around 12.10 in a very critical condition. He passed away at 12.34 due to lungs failure," Belle Vue Clinic spokesperson P Tandon said.
Thakur, an MP from Bongaon North seat, was the elder son of Mautua Maa, the leader of Matua community which plays a deciding role in polls in Bongaon. He is survived by his wife.
Thakur's younger brother Manjul Krishna Thakur is a minister in the Trinamool Congress state cabinet.