Frontier Airlines jet bound for LAX hits person on runway in Denver, aviation source tells ABC News

A Frontier Airlines flight taking off for Los Angeles from Denver International Airport on Friday night appeared to strike an individual walking on runway 17L, ABC News has learned.

At least one minor injury to a passenger has been reported and all those onboard the plane are being evaluated, which is standard procedure following an evacuation.

Passengers are evacuating the aircraft on the runway and being bused to terminals.

Pilots reported an engine fire and smoke inside the aircraft following the incident, according to air traffic control audio obtained by ABC News.

"Tower, Frontier 4345, we're stopping on the runway. Uh, we just hit somebody... we have an engine fire," the pilot is heard on the audio from ATC.

When asked how many people were aboard, the pilot responded, "We have 231 souls on board... There was an individual walking across the runway."

Moments later, the pilot reported worsening conditions and the need to evacuate.

"We've got smoke on the aircraft, we're gonna evacuate on the runway," the pilot said.

Fire crews were dispatched to the aircraft to extinguish the engine fire.

Authorities have not released additional information about the person on the runway or the circumstances that led to the incident.

ABC News contributed to this report.