Police are responding to serious crash at Tepko, South Australia

Emergency Service crews are at the scene of a serious crash after a car hit a tree at Tepko, between Murray Bridge and Mannum.

Just before 8.30am on Wednesday 11 March, a car travelling on the Mannum Road left the road surface and hit a tree.

The driver of the car has sustained life-threatening injuries.

The Mannum to Murray Bridge Road has been closed to all traffic with diversions in place around the crash site.

Major Crash Investigators from Adelaide are making their way to the scene.

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