A man has been found dead in a car parked at a 7/11 petrol station.

Police were called to the petrol station on Stacey St at Bankstown — in Sydney’s west — about 11.15pm on Sunday following a concern for welfare report.

A man, believed to be aged in his 30s, was found dead in the driver’s seat of a parked Audi.

He has not yet been formally identified.

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The man’s cause of death is unknown and police are investigating.