Major Collison Investigation Unit detectives are appealing for dashcam footage following a collision in Wantirna South last night that left a child with critical injuries.
It is understood a silver Toyota Corolla and a grey Nissan Skyline collided on High Street Road, at the intersection of Wallace Road, about 8.20pm.
One of the four occupants of the Corolla, an 11-year-old girl, was taken to hospital with life-threatening injuries where she remains in a critical condition.
A four-year-old boy was transported to hospital with serious, non-life-threatening injuries.
The driver of the Corolla, a 38-year-old Knoxfield woman, was taken to hospital with minor injuries.
The fourth passenger, a 38-year-old Knoxfield man, was not injured.
The two male occupants of the Nissan sustained minor injuries and did not require hospital treatment.
They stopped at the scene.
Police are urging anyone who was driving on High Street Road or Wallace Road prior to the collision to check their dashcam.
Investigations are ongoing into the circumstances of the collision.
Anyone who witnessed the collision or has dashcam footage is urged to contact Crime Stoppers on 1800 333 000 or visit www.crimestoppersvic.com.au