A toddler is dead after being run over by a car in the driveway of a western Sydney home on New Year's Eve.
Emergency services were called to a home on Wootten Street, Colyton after the 23-month-old boy was struck by a Mazda 3 just after 7pm.
The boy died at the scene.
The 23-year-old male driver has been taken to Nepean Hospital for mandatory blood and urine tests.
Police said a crime scene had been set up and forensic specialists were investigating.
The tragedy comes one day after a seven-month-old Queensland baby was killed when his mother reversed her car into his pram while leaving a funeral in Brisbane.
Police said today the mother was unlikely to be charged.
"The investigations are ongoing but it's unlikely they're going to charge a mother over something like this," a police spokeswoman said.
The boy's mother was the sole occupant of the vehicle and was not hurt, police said.