Dozens of passengers were forced to stand on the wing of an American Airlines plane at Denver International Airport as they evacuated the aircraft after one of its engines caught fire Thursday evening,

A fire on an American Airlines plane after it diverted mid-flight and landed at Denver International Airport sent fleeing passengers to a wing amid billowing clouds of smoke. Airport officials said 12 people were taken to hospitals with minor injuries.

Flight 1006 had departed from Colorado Springs and was headed to Dallas Fort Worth International Airport when it was diverted to Denver after the crew reported “engine vibrations.”