Homicide Squad investigating after body found in burnt-out car in south-west Sydney

Homicide detectives are investigating after the body of a young man was found in a burnt-out car in Sydney's south-west.

Emergency services were called to a vehicle fire on the Hume Road in Smithfield, near Parramatta, about 6pm yesterday.

After firefighters extinguished the blaze, police discovered the body of a man inside.

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The man is yet to be formally identified but is believed to be aged in his 20s.

The crime scene is being examined by specialist forensic officers and the Homicide Squad has been called in to assist detectives with the investigation.

A post-mortem examination will be conducted to determine the cause of death, but it is being treated as suspicious.

Anyone with information or who may have dashcam footage that may assist investigators is urged to contact Cumberland Police or Crime Stoppers on 1800 333 000.