Three people have been shot, Bolingbrook Police Captain Anthony Columbus said, but the condition of the victims is not known.
Bolingbrook Police were dispatched to the facility around 6:25 a.m. local time, and there is now a heavy law enforcement presence in the area as they search for the offender, according to police.
CNN has contacted WeatherTech for comment. The company manufactures automotive products, including floor mats.
The village of Bolingbrook is a southwest suburb of Chicago, approximately 30 miles from the city center.
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