A person who breached security and entered a runway at Denver International Airport was struck and killed by a Frontier Airlines aircraft during takeoff late Friday night, authorities said. The collision triggered an engine fire warning and forced an emergency evacuation of passengers on board.

A Frontier Airlines passenger aircraft was forced to abort takeoff after an engine fire broke out at Denver International Airport late Friday, prompting an emergency evacuation and a safety investigation.

More than 100 firefighters battled a massive five-alarm blaze at an apartment building under construction in Denver, officials said, as crews worked for hours to prevent the fire from spreading to nearby structures.

An American Airlines plane suddenly burst into flames after it diverted to Denver International Airport on Thursday night – forcing evacuating passengers onto the wing of the aircraft as thick black smoke consumed the tarmac.