Airport officials say a fourth person has died after a small plane crashed during a flight school training exercise.

The passenger had been taken by helicopter to an area hospital but later died.

The Federal Aviation Administration reports the twin-engine Piper PA-44 crashed during takeoff and exploded in flames Thursday evening.

The victims were not identified by officials at Palm Beach International Airport.

Records show the plane was owned by FIT Aviation LLC, a flight school in Melbourne.

Florida Institute of Technology and flight school officials said two students, a flight instructor and another passenger were on board.

The plane was heading back to Melbourne from the Bahamas during a training exercise.