A 35-year-old man died and three were injured after a portion of the ground floor and staircase of a four-storey building collapsed in north Delhi's Sadar Bazar area on Saturday, officials said.
According to fire officials, they received information about the incident at 6.28 pm, following which two fire tenders were rushed to the spot.
"The one injured moved to Hindu Rao Hospital has reportedly succumbed to injuries," Deputy Commissioner of Police (north) Sagar Singh Kalsi said.
The deceased has been identified as Gulab, a resident of Sitamarhi in Bihar, he said.
Police said a sudden sound and dust with the structural collapse of stairs occurred at an undergarments shop in the Qutub Road area.