The Delhi Fire Service received a call about the incident at 8 pm.
A portion of a dilapidated building collapsed in central Delhi's Karol Bagh area on Saturday, an official from the Delhi Fire Service said.
Four people, including a woman, who were trapped inside the building were safely rescued, he said.
The Delhi Fire Service received a call about the incident at 8 pm after which four vehicles, including a responder, were rushed to the spot, the official said.
No injuries were reported, he added.
The incident comes a few days after 17 people were killed in a massive fire at a hotel in Karol Bagh.