The incident occurred in Surendra Nagar area of the city.
"A man was selling masks day before yesterday here. Some people thrashed him and misbehaved with him accusing him of selling used masks. The police reached the spot and took the man to the police station. We did not find any evidence against the man," said SSP Muniraj G.
"A case has been registered against them for spreading rumours and thrashing the man,' he added.
( With inputs from ANI )