A freight train derailed in a Chicago suburb on Thursday and sparked evacuations of nearby homes and businesses.

The train derailed at 217th Street and Main in Matteson, NBC Chicago reported. A mandatory evacuation was underway amid a suspected leak from the derailed cars.

The evacuation affects people and businesses within a quarter-mile east, one mile west and one mile south of the site, according to the news station.

Canadian National Railway said the derailment involved about 10 cars “carrying various substances.”

Matteson police said additional information will be released later Thursday.

Matteson is a village in Cook County, Illinois, about 30 miles south of downtown Chicago.

This is a developing story. Please check back for updates.