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.

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.

A fire on an American Airlines plane after it diverted mid-flight and landed at Denver International Airport sent passengers fleeing onto a wing in a fraught evacuation amid billowing clouds of smoke.