India, March 10 -- At least seven workers died and three others left critically injured after a concrete retention wall collapsed at an under-construction site near Sidhrawali in Gurugram's Bilaspur area on Monday night, police said.

Investigators said a sewage treatment plant for an upcoming residential project is being built at the site, where the wall collapse triggered a soil cave-in at the basement. Survivors and contractors present at the site told police that at least 10 more workers are feared trapped under the debris.

Deepak Kumar Jewaria, deputy commissioner of police (Manesar), said the incident took place between 7.30pm and 8pm on Monday. "However, police received information about the incident after 9.15pm from the hospital...