The Lincolnshire-Riverwoods Fire Protection District responded to a commercial structure fire at W.W. Grainger headquarters Wednesday afternoon.
No injuries were reported after the fire started just before 1:00 P.M.. Several area fire departments responded to the fire at 100 Grainger Parkway in Lake Forest.
The fire department was originally dispatched to the scene for an activated fire alarm sounding. When they arrived on the scene, they found a fire in a mechanical room near the parking garage.
ComEd, North Shore Gas, and the Lake County Building Department was requested along with several area fire departments.
The cause of the fire is under investigation.