Amid the spurt in COVID-19
cases, police here have deployed drones, as a key surveillance instrument, to keep a tab on people's movement and prevent mass gatherings, if any, a senior officer said.
The unmanned aerial vehicles have been pressed into service over densely-populated localities -- Hatibagan and Shyambazar in northern part of the city and Burrabazar and New Market in central Kolkata - to record videos and aid the police in their efforts to enforce the lockdown order.
"At the moment, three drones are being used for the purpose.