A small plane has crashed into a car on a highway in California, killing at least one person, a woman in the back seat of the vehicle.

Five others, including the pilot and his passenger, were injured.

Witnesses at the scene were quick to help. 

The car had stopped on the side of Interstate-15 when the plane landed on its belly, skidded along the lane and slammed into it.

Authorities are investigating the cause of the crash.

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