MILLSTADT, Ill. (AP) — Authorities say two construction workers have died in a trench that collapsed at a wastewater treatment plant in southern Illinois.

The deputy chief of emergency services in St. Clair County says one man's body was recovered late Monday. Brian Donley says crews were working to recover the second man's body.

Donley says much of the excavation is being done by hand.

The trench collapsed around 3 p.m. during work to install a sewer line at the plant in the village of Millstadt.

The main construction company working on the plant says the two men worked for a subcontractor.