A dilapidated building collapsed in central part of the city following heavy showers in the early hours on Monday, killing two people and critically injuring two others, a disaster management official said.
The incident happened around 2.30am when the two-storey building came crumbling down at the Baithakkhana Road in Muchipara Police station area of the city, he said.
The deceased were identified as Gopal Naskar (60) and Manik Jana (48), both residents of the residential-cum-commercial building, a senior official said.
The two injured, Ratan Chaudhuri (48) and Binod Shaw (50), were admitted to a nearby hospital, he said.
"Rescue operations are underway to ascertain if anyone else is trapped under the debris.
Apart from local councillor, teams of Kolkata police and state disaster management personnel, along with fire brigade and civil defence officials, have reached the site," the official added.