A 41 year old motorcyclist has 'suffered significant injury' in a crash on La Route du Nord.
Police say a red Honda motorbike was the only vehicle involved in the RTC on Sunday morning (30 June).
It happened shortly after 11am near to La Fontaine Tavern.
The rider is being treated in hospital for his injuries.
Officers want to speak to any witnesses, or anyone with dash cam footage of the bike in the area at the time.
Anyone with information should call 612612, or Crimestoppers anonymously on 0800 555 111.

Number portability issue between Coop Mobile and JT resolved
Former teacher jailed and placed on Sex Offenders register
Opponents ask if St Mary solar plans have been 'abandoned'
Jersey takes step closer to protecting whistleblowers
Tickets on sale for women's Muratti
New 'competitiveness' plan to protect Jersey's £3bn financial sector
Fines for 'Jersey Lifts' drivers a step closer?
£225K grant given for clinical trial into heart failure