This is NBC Nightly News with Jose Diaz Ballard.

Good evening. We begin with that terrifying strike on the runway at Denver International Airport.

The airport confirming that a trespasser somehow jumped the fence and then was killed after being hit by a jet during takeoff.

A warning, what you're about to see is disturbing. This is what it looked like

on board the Frontier Airlines flight to Los Angeles, a passenger capturing the moment of impact

on camera. The collision triggering an engine fire, which filled the cabin with smoke, and then this,

chaos has hundreds of passengers on board evacuated the plane.

Here you can see some of them escaping on emergency slides.

And this is what it looked like on the ground after the plane came to a stop.

The Denver airport says a dozen passengers on the plane were hurt,

including five who were taken to local hospitals. And tonight, an investigation is underway

into how that person was able to get onto the run one. Our Liz Kreutz starts us off

near the scene in Denver.

This dramatic video, appearing to capture the moment a Frontier Airlines flight,

hit a trespasser on the runway as it was about to take off for Los Angeles.

I heard like a loud boom.

People started screaming.

The collision happening last night just after 11 p.m.

Frontier flight 4345 was on the runway at Denver International in the process of taking off when according to the airport, a pedestrian jumped the

perimeter fence and was hit just two minutes later while crossing the runway.

We did hit somebody. We have an engine fire. According to the airline, smoke was reported in the

cabin and the pilots aborted takeoff.

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