Police are appealing for witnesses following a serious collision in Thomastown on Thursday morning.
Greensborough Highway Patrol officers said a Mitsubishi utility was performing a U-turn at Dalton Road when the vehicle and a motorcycle collided about 7.30am.
The motorcyclist, a 22-year-old Diamond Creek man, was taken to hospital with life-threatening injuries.
The driver of the car, a 23-year-old Roxborough Park man, stopped at the scene.
He has subsequently been arrested, and has since been released pending further inquiries.
The investigation is ongoing.
Investigators are urging anyone who witnessed the collision, has dash cam footage or any information that could assist investigators to contact Crime Stoppers on 1800 333 000 or submit a confidential report via www.crimestoppersvic.com.au
Tributes paid to former Barrow nightclub owner Harold Studley
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