CHENANGO COUNTY, N.Y. -- The Chobani yogurt plant in New Berlin had to be evacuated Monday morning. Employees were relocated after an ammonia leak was detected just after nine.

The leak was found in a chill tunnel.

Chobani says the leak was caused by an error made by a contractor while working on an AC line.

Two workers were taken to the hospital as a precaution, but were later released.