Child in serious condition after car crash in western Sydney

A four-year-old boy was taken to hospital after being hit by a car in western Sydney this afternoon.

Just before 3pm, emergency services were called to Blacktown Olympic Avenue in Rooty Hill following reports that a pedestrian had been struck by a car.

Paramedics treated the four-year-old at the scene before he was taken to Westmead Children's Hospital in serious condition.

The 53-year-old driver was taken to hospital for mandatory tests.

The police are investigating the circumstances of the incident.

Anyone with information is asked to contact Mount Druitt Police or Crime Stoppers.