Police are investigating if two collisions involving cyclists in Cheltenham and Beaumaris on Tuesday morning (Jan. 23) are linked.

Officers were called to Beach Rd about 5.20 and were told a 51-year-old man was riding along Beach Rd, near Charman Rd in Cheltenham, when he was involved in a collision with an unidentified vehicle.

The car failed to stop and the rider was taken to hospital with serious injuries.

A short time later a second cyclist, a 72-year-old man, was also involved in a collision on Beach Rd in Beaumaris near Tramway Parade.

He too was taken to hospital with serious injuries and again the vehicle involved failed to stop.

Around 8.50am police were called to Central Avenue, Black Rock after an allegedly stolen Holden Astra was located.

Police are yet to establish if this vehicle was involved in either collision.

The investigation into the incidents is ongoing.