LOS ANGELES (AP) —  The California Highway Patrol says four cars were struck by parts of a small plane when it crashed on a Southern California freeway and burst into flames. But authorities say none of the drivers were injured.

CHP Commander Ryan Shackleford says the Cessna 310 aircraft hit the center divider when it crashed on Interstate 405 on Friday morning before it caught fire.

The Federal Aviation Administration said the pilot declared an emergency shortly after taking off from John Wayne Airport.

FAA spokesman Ian Gregor said the plane was trying to return to return to the airport when it fell from the sky and crashed on the freeway.

Orange County Fire Capt. Larry Kurtz says an off-duty firefighter rescued the two people from the wreckage.

He says the two people aboard the plane — a man and woman in their 50s and 60s — were taken to the hospital with traumatic injuries.