Passengers onboard a Southwest Airlines flight from Burbank to Las Vegas said their pilot "aggressively" dived to avoid a midair collision.

Minutes after takeoff Friday, a Southwest flight leaving Burbank, California, rapidly descended because another aircraft was in the area, injuring two flight attendants and frightening passengers, according to officials and those on board.

After departing from Burbank, traffic alerts required a Southwest Airlines flight crew on a Las Vegas-bound plane to "climb and descend to comply with the alerts," according to an airline representative.