A portion of a chawl collapsed in Malvani area on Mumbai on Thursday, fire brigade officials said.
Four people have been injured and few others were feared trapped under the debris, they said.
A part of the three-storey chawl (old tenements), located at Malvani gate number 5 in the western suburbs, collapsed around 2.30 pm, a fire brigade official said.
Four fire engines, a rescue van and ambulances were rushed to the spot.
According to the official, five to six people were trapped under the debris. Of them, four were rescued and sent to hospitals after being provided first aid.
"Search and rescue operation is on at the site," the official said.
The city has been experiencing heavy rain since the last couple of days.