A man has suffered life-threatening injuries after being struck by his own vehicle while trying to stop it being stolen in Melbourne’s north-east.

Police say they were called to Blackwood Parade in Heidelberg West around 7.30pm on Saturday after reports a man had been struck by a car.

A man had been attempting to stop his car being stolen by an unknown offender when he was struck by the vehicles, witnesses told officers.

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The car and offend fled the scene and remain on the run.

The 68-year-old victim was taken to hospital with life-threatening injuries.

“A crime scene has been established and the investigation is ongoing,” police said in a statement.

“Major Collision Investigation Unit detectives are processing the scene.”

Anyone with information or footage of the incident is urged to contact Crime Stoppers.