MUMBAI: One person died and five others were injured after a portion of a house wall crashed onto another house at Rajjak Chawl, Kherwadi, in Bandra (east) in the early hours of Monday.
A total of 17 persons were rescued.
BMC officials said heavy rainfall may have caused the structure to collapse.
They said several families living on the banks of Vakola nullah and Mithi River will be temporarily moved to safer locations.
The BMC said the ground-plus-four storey structure that collapsed was illegally constructed on land belonging to the railways.
According to officials, the incident occurred around 1.45 am.
“While locals had managed to rescue six people, the Fire Brigade rescued 11 others.
The injured were sent to Bhabha and V N Desai Hospitals,” the official said.
Officials said Riyaz Ahmad (28) was declared dead on arrival at hospital, while the injured victims were in a stable condition.
A senior civic official said they would investigate the exact cause of the collapse.