Toddler killed after being struck by car in driveway in Sydney's west

A 23-month-old child has been killed after being struck by a car in a driveway on Wootten Street, Colyton, in Sydney's west.

Emergency services were called to the premises just after 7pm after the young boy was hit by a Mazda 3 in the driveway of the home.

The child died at the scene, while the 23-year-old driver of the vehicle involved has been taken to Nepean hospital for mandatory blood and urine testing.

Police are continuing inquiries, with a crime scene established to be examined by forensic specialists.