A diverted American Airlines plane caught fire on the tarmac after making an emergency landing at Denver International Airport with engine issues Thursday evening, forcing passengers to evacuate the burning aircraft, authorities said.

Two investigators from the National Transportation Safety Board were already at work Friday to look into the fire that appeared after American Airlines flight 1006 arrived in Denver the evening before.

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,