Body found on highway after suspected hit-and-run in Victoria's north-east

Victoria Police are calling for witnesses after a motorcyclist was hit and killed in the state's north-east this morning.

Emergency services were called to the Maroondah Highway near Parsons Road at Yarck about 11.30am after the body of a motorcyclist was found on the road.

Police said the motorcycle may have collided with a white semi-trailer truck headed west, which did not stop at the scene. 

The male motorcyclist died at the scene and is yet to be formally identified.

Police are working to determine the exact circumstances of the crash and urged anyone who may have witnessed the incident, or have footage, to come forward.