Summary:
Police are appealing for witnesses after a four-year-old boy was killed in a crash in Sydney's north-west.

Full article:
A young child has tragically died after a horrific accident where a four-wheel-drive struck him while he was riding his bicycle at a Sydney intersection. The boy sustained serious head injuries on Monday at 5.45pm and was taken to The Children's Hospital at Westmead where he later died a short time later. He was riding his bike at the intersection of Paddock and Capertree streets at The Ponds - north-west of Sydney. A young child has tragically died after a horrific accident where a four-wheel-drive struck him in Sydney's north-west . Before he was taken to hospital NSW Ambulance Service paramedics treated the boy at the scene. The driver of the 4WD is assisting police with their investigation. Police are now appealing for anyone who witnessed the incident to contact Quakers Hill Police. Anyone with information in relation to this incident are urged to call Crime Stoppers on 1800 333 000 or visit nsw.crimestoppers.com.au. The boy sustained serious head injuries on Monday at 5.45pm and was taken to The Children's Hospital at Westmead where he later died a short time later . He was riding his bike at the intersection of Paddock and Capertree streets in The Ponds .