A policeman has been hit by a ute after the driver reversed into an ambulance and police car, before ploughing into the officer and driving off in Melbourne’s south-east.

Emergency services were called to a fast food outlet on the intersection of Warrigal and Kingston Roads at Heatherton just before 12:30am, responding to reports a driver was slumped over the wheel of the vehicle.

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Police said when the officer alerted the driver they were there, the man reversed and crashed into the cars, before driving forward and over the officer.

The dark-coloured dual cab Ford Ranger, which had no number plates, then drove off.

The policeman was taken to the Alfred Hospital with non-life threatening injuries.

Investigators have urged anyone with information to contact Crime Stoppers.