No one was hurt following an ammonia leak at the Tyson Poultry plant, in Storm Lake, last night.
The Storm Lake Fire Department was called to the plant shortly after 11-30 p.m. last night.
Staff told authorities ammonia was leaking from a fitting on a chiller in the white meat room.
The plant was evacuated.
Staff isolated the leak and ventilated the building. Crews were on scene for two hours.
No environmental impact is expected.