New Delhi, Aug. 15 -- Six people have lost their lives on Friday after a portion of the roof of a room at Dargah Sharif Patte Shah collapsed near Humayun's Tomb, an official said.

"Six people have lost their lives in the incident...It is a matter of investigation, and action will be taken if someone was living illegally here in the ASI site," said District Magistrate South-East Delhi, Sravan Bagaria.

The incident site, located near Humayun's Tomb, was quickly cordoned off to ensure safety and to facilitate rescue efforts.

The cause of the incident is yet to be ascertained, officials said.

The officials said that NDRF personnel conducted a search operation inside the dargah premises to check for any more people trapped under the debris...