Minibus examined after NSW killing

A minibus is undergoing forensic examination as NSW Police continue their investigation into the possible murder of a man in Sydney's south.

A crime scene was set up at a car park in Kingsgrove following the discovery of the man's body in the bus on Wednesday morning.

Investigators say the man's death is being treated as suspicious and the homicide squad is assisting with the investigation.

The bus was taken to the Sydney Police Centre on Wednesday night to be forensically examined.

One local worker told AAP he did not believe it had been parked in the industrial car park for long.

Detectives have called for anyone who was in the area in the lead up to the discovery to contact them or Crime Stoppers.