Hundreds of rescue workers were working to pull out people trapped inside the debris of the structure. The building housed 200 people in the congested Lalita Park area.

The foundation of the building had weakened due to water having seeped in during the monsoon when the Yamuna had breached its banks, according to officials.

At Lalita Nagar, the anger spilled over on the streets. As the owner of this building went missing, residents said it was a tragedy waiting to happen.

People said that the building collapsed when an attempt was being made to build extra floors.