Wallan Highway Patrol officers are appealing for public assistance as they investigate a hit-run collision in Beveridge last week.
It is understood a white truck was travelling on the wrong side of the road on Minton Street before it collided with a white Nissan Navara utility on Monday 9 June about 2.55pm.
Police were told the male truck driver stopped at the scene and spoke to the occupants of the Nissan, then fled in the truck.
The rear passenger of the Nissan, a 17-year-old Wallan girl, was taken to hospital with serious, non-life-threatening injuries.
The driver, an 18-year-old Aberfeldie man, and the front passenger, a 51-year-old Wallan woman were both taken to hospital with non-life-threatening injuries.
The truck driver remains outstanding at this stage and police are urging anyone who was in the area around the time of the collision to check their dashcams.
He is described as being short, in his late 40's with a shaved head and stubble on his face.
The man was wearing a black top and grey/black pants at the time of the collision.
Investigators have released CCTV footage and images of a white truck, which has yellow on the top of the cabin.
Anyone who witnessed the incident, has dashcam footage or recognises the truck is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au.
