NEW DELHI: A three-storey under-construction building collapsed in Old Delhi's Chawri Bazaar on Thursday, with several people feared trapped under the debris, officials said.The incident was reported at 9.50am from Gali Sitara, near the Chawri Bazaar Metro station.At least six fire units, including water tenders and rescue vehicles, have been rushed to the spot.Senior officers are supervising the rescue operation, officials said.Further details are awaited.

The incident comes nearly two months after a five-storey building housing a paying guest (PG) accommodation collapsed in south Delhi's Satya Niketan on September 6, killing seven people.