A toddler has died after being hit by a vehicle in a driveway at Lake Macquarie on Monday afternoon.
Emergency crews - including police, several ambulances and the Westpac Rescue Helicopter - were called to Rosemary Row at Rathmines just before 2.30pm after reports of the incident.
Paramedics began treating the 22-month old on arrival but he died at the scene, police said.
Officers from Lake Macquarie Police District are investigating the tragedy.
On Monday evening, police said a 38-year-old man had been taken to John Hunter Hospital for mandatory testing.
A police spokesperson said a report would be prepared for the Coroner.