Excerpts from wrex.com:

The Rockford Fire Department received an automatic fire alarm in the Winnebago County Court Building Complex in the 400 block of Elm St. at around 10:45 p.m. Saturday. As the first firefighters got to the scene, they did not find any smoke coming out from the building. Crews later found smoke in the basement of the building, where firefighters found a large fire in a storage room. The fire started in an area that did not have access to the building’s sprinkler system. Firefighters encountered high heat and heavy smoke as they were battling the blaze.

One firefighter who was injured, was taken to the hospital and later released.

Damage caused by the blaze is estimated at $225,000.