Multiple fire departments respond to the Illinois Railway Museum, 7000 Olson Road in Union, for a structure fire Monday evening. | Photo: MFRD

No injuries were reported after the roof of a building caught fire at the Illinois Railway Museum in Union Monday evening, fire officials said.

The Union Fire Protection District and Marengo Fire & Rescue Districts responded around 5:59 p.m. Monday to the Illinois Railway Museum, 7000 Olson Road in Union, for a reported commercial structure fire.

Marengo Fire & Rescue Districts Communication Specialist Alex Vucha said firefighters arrived within six minutes to find light smoke showing from a building.

Multiple fire departments respond to the Illinois Railway Museum, 7000 Olson Road in Union, for a structure fire Monday evening. | Photo: MFRD

The 20 by 400-foot building contained historic railroad equipment and rolling stock.

The fire was reported by staff members on the property who assisted in directing firefighters to the building, Vucha said.

Firefighters located an active fire burning along the south roofline and quickly spreading inside.

Firefighters pulled two hose lines and extinguished the fire within 15 minutes, Vucha said.

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Multiple fire departments respond to the Illinois Railway Museum, 7000 Olson Road in Union, for a structure fire Monday evening. | Photo: MFRD

The building sustained minor structural damage and the railroad equipment inside sustained minor smoke and water damage.

Initial damage estimates are less than $50,000, Vucha said.

“We appreciated the assistance of our automatic aid and mutual aid [fire] departments who assisted at the scene and covering our stations during the incident,” Vucha added.

The cause of the fire remains under investigation but is not believed to be suspicious in nature.