Three wards of Kamarhati Municipality, on the northern fringes of the city, have been declared as micro-containment zones by the board of administrators.
The move followed an alert from the health department that these pockets were recording multiple Covid cases.
The three wards cover Jatin Das Nagar, to the east of BT Road in Belgharia, and parts of Nowdapara.
“There won’t be any restrictions on the movement of residents,” said Gopal Saha, the chairman of the board of administrators. “The focus will be on sanitisation and adherence to Covid protocols,” said Saha.
Similar zones will soon be set up across several other municipalities in North 24-Parganas, an official said.