A motorcyclist has been flown to Southampton for medical treatment.
It follows a crash near Longbeach car park in Grouville on 16 February.
A car and motorbike collided at around 1:30 pm.
The police say the person on the motorcycle has 'serious injuries'.
States of Jersey Police would like any witnesses or people with CCTV or dashcam footage from the time to contact them on 612612 and refer to M01160/2025.

Plans to modernise Jersey's 'extremely outdated' cremation rules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