Seven men, all locals, were arrested for their alleged involvement in assaulting the policeman Golak Sarkar late last night, they said. A search for three other persons have also been initiated.
The incident happened at around 12.45 am, when Sarkar and a traffic constable stopped a bike as the riders were not wearing helmets, a senior officer of the department said.
"Both started questioning the traffic sergeant which soon deteriorated into a verbal duel. Both challenged our officer and telephoned their friends in the nearby Picnic Garden locality," the officer said.
"They assaulted our officer and tried to snatch his walkie-talkie. The entire incident got recorded on the body camera of Sarkar," he said.
Following the incident, the traffic sergeant lodged a complaint at the Gariahat Police Station and based on the footages from his body camera, seven persons, including the biker, were arrested, the officer added.
Under the West Bengal Motor Vehicles Act, one person driving a two-wheeler without a standard helmet will attract a minimum fine of Rs 100.