A cop and two civic volunteers were injured in two separate locations in the city while conducting naka-checking and drive against drink driving.
A constable of Jadavpur traffic guard was injured in front of Jadavpur police station when a scooter allegedly hit him while trying to flee when the policemen tried to stop it.
The second incident took place in Kasba.
A motorist prosecuted for alleged drink driving attacked two civic volunteers when they tried to take him to hospital for a medical examination.
In both the cases, the accused — who were allegedly found in an intoxicated state — were arrested, the police said.