Fire crews are at the scene of a plant in south suburban Chicago Heights.
The incident happened around 7 a.m. Thursday at 333 State St.
There are reports of a man falling into a mixer in the dryline area of the plant.
Firefighters are trying to recover the man, but police are not saying what exactly happened.
The plant is said to be a company called Vesuvius.
This is a developing story. More details as they become available.