Streator firefighters responded at 12:47 a.m. Saturday morning to Owens-Illinois Glass Factory.
Large amounts of smoke were visible while on their way to the fire.
Firefighters made it on scene in three minutes and were able to assist plant fire crews in extinguishing the blaze and mitigating damage. The fire was under control in about 30 minutes, and firefighters were on scene for about two hours.
No injuries were reported.