At least six people died and up to 15 more were injured when an unauthorised building under construction collapsed on the outskirts of Mumbai, Indian police said.
"A section of an under-construction, seven-storeyed building collapsed suddenly at around 6.30 pm," an official at the Shil-Dayghar police station in the Thane region of western India's Maharashtra state, told AFP late Thursday.
"Six people have lost their lives," he said.
Police said at least 20 people have been rescued from under the debris, but added that "several more" were feared to be trapped.
The injured are being treated at nearby hospitals.
Four floors of the unauthorised building were occupied by some families, he said.
Incidents like this are common in India where dwellings often collapse due to poor construction materials, lack of building regulations and sometimes heavy rain.