Police are investigating the circumstances surrounding a fatal collision which occurred in Tyabb this afternoon. Investigators have been told a car was travelling along the Frankston-Flinders Road about 2.30pm when the driver lost control of the vehicle. The car left the road and crashed into a tree. Emergency services attended the scene but were unable to save the driver of the car, believed to be a man in his 70s. There are currently traffic diversions in place. Anyone who witnessed the collision or anyone with information is urged to contact Crime Stoppers on 1800 333 000.