CHICAGO — A fire at a suburban Chicago air traffic control facility that shut down the city’s two airports Friday was intentionally set by a contract employee, police said.

The early morning fire forced the evacuation of the control center in Aurora, about 40 miles west of downtown Chicago.

Emergency crews found a man in the basement with a self-inflicted wound and took him to a hospital.

The man was a contract employee of the Federal Aviation Administration, said Aurora Police Chief Gregory Thomas.