A Frontier Airlines plane fatally struck a pedestrian on the runway at Denver International Airport on Friday during takeoff, according to airport officials and witness accounts.

Surveillance video captured the individual walking onto the runway at Denver International Airport before being struck by the Frontier aircraft as it departed for Los Angeles. The incident occurred just minutes after the person was observed entering the restricted runway area.

Passengers aboard the flight reported experiencing smoke in the cabin following the collision. The aircraft, which was bound for Los Angeles, experienced flames erupting from the plane after the impact with the pedestrian.

The individual who entered the runway was killed in the incident. Airport security protocols are designed to prevent unauthorized access to runway areas, though details about how the person gained access to the restricted zone have not been disclosed.

Frontier Airlines and Denver International Airport officials have not immediately responded with additional details about the incident or its aftermath. The Federal Aviation Administration typically investigates such incidents involving aircraft and runway safety.