THE death of a motorcyclist in the Royal National Park yesterday afternoon is being treated as a hit-and-run.
Around 3pm police were called to Mckell Avenue at Waterfall after reports the motorcyclist had crashed.
The 58-year-old man was found lying on the road next to his bike suffering fatal injuries.
Officers from the Metropolitan Crash Investigation Unit examined the scene and discovered evidence a truck had been involved in a collision with the motorcyclist.
Investigators were also told a white medium sized truck with a flat rear tray was seen driving in the area shortly after the incident.
The man driving the truck was between 20 to 35 years of age and wearing a fluorescent high-visibility work shirt.
Investigations will today attempt to view CCTV from nearby Waterfall Railway Station which might show the vehicles which travel along Mckell Avenue.
The motorcycle has been seized for forensic examination.
At this stage, police have not spoken to anyone who witnessed the actual collision and are appealing for the truck driver, or anyone who knows him, to come forward.
Anyone who can help is urged to contact Metropolitan Crash Investigation Unit or Crime Stoppers on 1800 333 000.