Police are investigating a hit-run collision in Marshall this evening.
It is understood a red Holden Commodore sedan collided with a silver Mazda hatch on Barwarre Road about 6.15pm.
Police said the female driver of the Mazda, a 42-year-old from Armstrong Creek, was airlifted to hospital with life-threatening injuries.
Police were told the male driver of the Commodore dumped the vehicle and fled on foot.
The male and female passengers of the Commodore remained at the scene.
They were both taken to hospital with minor injuries.
The exact circumstances surrounding the collision are yet to be determined and investigations remain ongoing.
Anyone who witnessed the incident, has dashcam/CCTV footage or information is urged to contact crime Stoppers on 1800 333 000 or submit a report at crimestoppers.com.au