Burrabazar, the place where the building collapsed, is also the commercial hub of Kolkata. (Photo: ANI | Twitter)

Kolkata: A four-storey dilapidated building in the Posta area of central Kolkata collapsed on Tuesday, killing one member of a family and grievously injuring two others, police officials said.

The three were trapped inside a room when the building collapsed, they said.

Taraprasanna Saha, Sobha Rani Saha and Beauty Roy were pulled out by local residents and fire brigade personnel, the officials added.

They were taken to the Calcutta Medical College Hospital where doctors declared Taraprassana as "brought dead". The injured, who are in a critical condition, were admitted to the hospital.

It was not immediately known how they were related, and if there were others in the building.

The police said people were living there even after it had been declared a "dangerous structure" by the Kolkata Municipal Corporation.

The area was cordoned off and the building evacuated, they said.