India, March 11 -- Authorities remained in the dark about the fatal wall collapse that left seven men dead at a construction site in Gurugram's Bilaspur for over two hours Monday night and learned of the tragedy only after a hospital across the border in Rajasthan alerted them, officials aware of the matter said on Tuesday.

The incident occurred around 7.30pm at a sewage treatment plant being constructed at an upcoming residential project. A concrete retention wall collapsed, triggering a soil cave-in that trapped workers.

Critically, no official at the site sent any alert or sought help from local authorities with jurisdiction over the area, officials cited above said.

All seven deceased and four injured workers were taken to a govern...