Police are seeking the driver of a vehicle, believed to be a Vauxhall Corsa, after a collision in Bures.
Emergency services have been called to two crashes involving motorbikes this morning.
At 10.53am police were called to the A1304 at Newmarket, close to the entrance to the Millenium grandstand, after a Honda CRV collided with a Harley Davidson.
The motorcyclist, a man in his 20s, received only minor injuries.
Emergency services were also called to the B1077 just north of Helmingham at 10.58am after a crash between a car and motorbike.
The rider, a man in his 60s, was conscious and breathing but suffered some chest pain.
The road was cleared by 11.29am.
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