Officials are investigating the cause of an ammonia leak at a Pilgrim’s Pride plant in Marshville, N.C., that forced the evacuation of 550 employees and 25 nearby families. The leak was discovered at the poultry plant around 5 a.m. Tuesday, company officials said. Plant employees were evacuated around 6 a.m., but no injuries were reported, reports The Sun News.

The surrounding homes in a 1.5-mile radius of the plant were also evacuated, and most residents were allowed to return to their homes by midday. The interior of the plant is said to have suffered significant damage, according to Marshville Mayor Frank Deese. It is unclear when the plant will be able to reopen.

Source: The Sun News