The OC of Shyampur police station Suman Das with a police team had gone to Bargarchomukh village yesterday night after hearing reports of the clash between two groups over property dispute, they said.
When the police were trying to disperse the two groups, the OC and another policeman were attacked by a mob, the police said.
The injured OC has been admitted to hospital, they said adding a large police contingent later went to the spot and brought the situation under control.