OMAHA, Neb. (AP) — Nearly 20 Omaha flights into or out of Chicago airports have been canceled because of a fire at an air traffic control facility in a Chicago suburb.

Omaha Airport Authority officials urged travelers to check with their airlines or go online at www.flyoma.com to see whether their flights have been affected.

Officials say Friday’s early morning fire started in the basement of the Chicago Air Route Traffic Control Center in Aurora, forcing evacuation of the center. More than 850 flights had been canceled in Chicago alone, and more cancellations were expected.

Lincoln Airport operations director Bob McNally says one inbound and one outbound flight have been canceled.