Frontier Airlines jet fatally strikes trespasser during takeoff at Denver airport

A Frontier Airlines jet at Denver International Airport struck and killed a trespasser on an active runway during takeoff for Los Angeles.

The crew aborted the departure after reporting smoke and an engine fire, then evacuated passengers on the runway.

Officials said the runway was closed and investigators are examining how the security breach happened.

The deadly incident disrupted airport operations and triggered a federal safety investigation.