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.

The Southwest Boeing 737 departed just before noon local time on Friday for a scheduled flight to Las Vegas. Six minutes after takeoff, a privately owned Hawker Hunter fighter jet crossed less than two miles in front of the Southwest plane, passing within a few hundred feet of the same altitude, according to flight tracking site Flightradar24.

Passengers aboard a Southwest Airlines jet from Burbank to Las Vegas said their pilot had to “aggressively” dive to avoid a midair collision with another plane shortly after takeoff on Friday afternoon.