A teenage cyclist was taken to hospital after a collision with a grey car in Norwich.
The incident happened at around 3pm on June 1 at the junction of Ipswich Road and Marston Lane.
The driver stopped at the scene, but left without exchanging details.
Police are now appealing for witnesses or anyone with dashcam footage.
Information can be reported to the police via their website or by calling 101, quoting reference 381 of June 1.