A Delta Airlines flight was forced to make an emergency landing in Iowa after a passenger tried to open an emergency exit door mid-air — and got into a fight with a flight attendant.

A Minnesota-bound Delta flight had to return to Chicago Wednesday because an “unruly” passenger was causing a disturbance, according to the airline. Delta said Flight 1902 from O’Hare Airport to Minneapolis-St. Paul returned to Chicago at 12:09 p.m., and the passenger was taken off the plane.