An e-scooter and a car have collided, leaving the 26-year-old rider in hospital with a serious head injury.
The collision happened at around 7.35 pm on Sunday (23 June) on Belvedere Hill near the junction with Bagot Road in St Saviour.
Jersey Police say the driver of the car is uninjured.
Officers would like witnesses to the collision to contact them on 01534 612612 or anonymously using Crimestoppers on 0800 555 111.
Anyone with video footage from doorbell cameras or dashcams is also asked to send it to the police.

Plans to modernise Jersey's 'extremely outdated' cremation rules
Driver 'seriously injured' in Grouville crash
Jury finds Shay John Bester guilty of offences including rape
African community groups express 'disappointment' with Deputy Ozouf sentencing
Island Energy to return to Royal Court over Mont Pinel gas explosion
Jersey to introduce legal limit for PFAS in drinking water
Jersey Electricity drops St Martin solar farm idea
PPC won't move to block Deputy's return to States Assembly