SOUTH SIOUX CITY, Neb. (AP) — A worker at a northeast Nebraska energy plant is recovering after being exposed to hydrogen sulfide.

The Sioux City Journal reports the worker’s injury was reported around 7 p.m. Wednesday. It’s the second time this fall that a Big Ox Energy was hospitalized after exposure to hydrogen sulfide.

Big Ox spokesman Kevin Bradley says the worker hurt Wednesday was installing a new pipe. He was in stable condition at the hospital.

Bradley says the company is working to determine how the gas leaked out. Regulators at the Occupational Safety and Health Administration will be notified of the incident.

Some residents near the plant have been forced to leave their homes because of odors emanating from the plant. The city is working to resolve the odor problem.