A 37-year-old Trinamool Congress worker was beaten to death last night at Goghat, about 100 km from Kolkata.
Lalchand Bag was allegedly thrashed not far from his home in Darinakunda village. When locals came and rushed him to hospital, he was already dead.
Six BJP supporters have been arrested in the case.
Local TMC leader Narayan Chandra Panja claimed BJP supporters had hurled bombs at the victim's house on the night of July 21 because he had attended Mamata Banerjee's rally in Kolkata. Neighbours raised an alarm and the men fled after that.
Last evening, around 10pm, former CPM supporters who have now joined the BJP allegedly waylaid him, beat him up brutally and left him outside the home of a TMC worker, Mr Panja said.