A small plane crashed on a Southern California freeway Saturday and struck a car, killing one person and injuring five others, AP quoted authorities as saying. Witnesses told dispatchers that the plane landed on a vehicle on Interstate 15, about 50 miles north of San Diego. Photos on Twitter showed the nose of the white and blue plane crumpled into the rear of a small black sedan on the shoulder of the freeway. One person in the car was killed, and three others from the vehicle were taken to a hospital, California Highway Patrol Officer Tony Polizzi said. Two occupants in the plane also were transported for treatment. The conditions of the injured were not immediately known. The plane was a single-engine Lancair IV, according to Ian Gregor of the Federal Aviation Administration. The FAA and National Transportation Safety Board will investigate the crash.