Two workers were taken to the hospital after an ammonia leak at the Kellogg plant in Mariemont.
Fire crews were called to the plant at 1:11 a.m. Monday morning.
Officials evacuated the plant. Three workers became sick. One was treated at the scene. One person was taken to Jewish Hospital, another to Bethesda North Hospital. Crews were able to secure the leak.
The scene was cleared around 4:30 a.m.
The plant is located at 1 Trade Street just off Wooster Pike.