Supporters of the CPI(M) and the Trinamool Congress clashed at Toofanganj in West Bengal's Cooch Behar district on Monday. Five policemen, including a deputy superintendent, were injured while trying to quell the disturbances.
The situation in the town had been tense since Sunday when the local CPI(M) leadership accused Trinamool supporters of assaulting a party candidate for the May 30 civic body elections. On Monday, when the CPI(M) local unit called a six-hour bandh, supporters of both parties clashed, and ransacked each other's offices.
Twenty persons were arrested on charges of rioting. Rapid Action Force personnel were deployed in the area.