A Southwest Airline jet heading to Las Vegas from Southern California took a dramatic plunge shortly after takeoff Friday in response to an alert about a nearby plane, sending some passengers flying out of their seats and injuring two flight attendants.

The incident occurred about six minutes after Southwest flight 1496 took off from Hollywood Burbank Airport in Los Angeles County.

The passenger jet was responding to an alert of another aircraft in the vicinity, federal authorities said. A Cold War-era military plane was nearby at the time.

A Southwest flight out of Burbank rapidly descended 475 feet to avoid another plane on Friday, according to flight tracking data and passengers on the plane.

The incident occurred shortly after take off from Hollywood Burbank Airport with at least two flight attendants injured, reports say.

Alarms sounded in the cockpit of a Southwest Airlines jet shortly after taking off from Hollywood Burbank airport near Los Angeles on Friday, prompting evasive maneuvers, the airline said in a statement.

Southwest passengers will be assigned seats, ending the chaotic scramble of its current open seating plan. The ability to choose your seat opens July 29, 2025, for flights departing in 2026 and beyond.

The National Weather Service issued a flash flood warning at 7 p.m. on Saturday in effect until 10 p.m. for Armstrong, Indiana and Westmoreland counties.