A man has died when his car crashed into a light pole and then into a tree.
Police and paramedics were called to Port Wakefield Hwy at Waterloo Corner, north of Adelaide, about 3.45am on Sunday.
The driver, a 27-year-old man, died at the scene.
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Port Wakefield Hwy was closed to northbound traffic.
Traffic diversions were in place at Old Port Wakefield Rd.
Anyone who witnessed the crash or has any information has been urged to contact Crime Stoppers.