A motorcyclist suffered leg, head and pelvic injuries when his bike collided with a post in King's Lynn in the early hours of today.
The blue Yamaha motorbike left Hardwick Road near the junction with St Hilary Park Road, at about 12.30am.
The road was closed until 5.20am while a collision investigation got underway.
The male rider in his 20s was taken to the Queen Elizabeth Hospital for treatment.
Officers want to speak to anyone who witnessed this collision and are particularly interested in a vehicle that may have been involved but left the scene prior to police arrival.
Contact Swaffham Roads Policing on 101.
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