Investigations are underway after two cars were set ablaze overnight on Monday outside a property in Sydney’s west.

About 2.20am a suspicious blaze ignited a vehicle on Corio Drive, St Clair - quickly spreading to a second car.

Emergency services rushed to the scene as firefighters extinguished the flames.

No one was inside the vehicles at the time, and there are no injuries reported.

The two vehicles appear to be a white Honda Civic and a silver Holden Commodore.

One of the car owners, who wished to remain anonymous, told The Daily Telegraph “we can’t think of anyone who would want to do this".

His neighbour, truck driver Collin Sly, was at home when he heard a loud bang, before seeing the vehicles in flames.

“I looked up the street and I saw tail lights heading up Cook Pde,” Mr Sl

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