New Delhi, As many as 12 people were rescued, two with critical injuries, after a three-storey commercial building collapsed near the Saket metro station in south Delhi on Saturday evening.

The entire structure was reduced to a massive mound of rubble, with twisted metal, broken pillars and concrete slabs scattered across the site.

"A total of 12 people have been rescued. Two are critically injured. It doesn't look like anyone else is trapped but the search operation is still ongoing," a senior police officer said, adding that a case will be registered over the incident.

A multi-agency operation is underway to search for anyone who may be still trapped under debris, officials said.

Witnesses said cries for help could be heard from beneath the debris. "All we could hear were screams coming from under the rubble. There was a huge cloud of dust. When it settled, we realised that part of an adjoining structure had also been affected," a local resident said.