A worker at Chicago's O'Hare International Airport was critically injured on Saturday when a tug truck he was operating was struck by the wing of an aircraft.

“Air Wisconsin Flight 6181 struck a tug while approaching the gate at Chicago O’Hare International Airport around 7:35 p.m. local time on Saturday, Feb. 1,” the FAA said on its website. The FAA identified the plane as Bombardier CRJ-200. American Airlines confirmed the aircraft was operating for American Eagle.

The wing of an Air Wisconsin plane struck the vehicle, which was trying to cross a taxiway at Chicago O’Hare International Airport, officials said.

One man was hospitalized after the wing of an aircraft crashed into a tug truck at Chicago O'Hare International Airport on Saturday.

The 64-year-old tug driver sustained head and lower body injuries and was transported to the hospital in critical condition but was later stabilized, Chicago police said.