A cyclist has been flown to Southampton Hospital after being involved in an incident on St Saviour's Hill.
The 31-year-old man is in a serious, but stable, condition and is receiving further treatment in the UK.
Officers believe the man was cycling down the hill around 12:45 am, and officials say it was a 'single vehicle incident'.
The rider was wearing dark shorts, an orange jumper and white trainers.
The police would like to speak to anyone who saw him or who has dashcam or doorbell footage from 18 May.

Jersey celebrates 81 years of Liberation
Victoria College twins with secondary school in Bad Wurzach
Jet2 increases capacity to Jersey by 140% for summer 2027
10-day Liberation International Music Festival gets underway
Flower mural in St Brelade's dubbed 'graffiti' and covered up
Future politicians called to action over visitor economy at 'tipping point'
Police seek information on alleged domestic assault after festival in St Helier
House prices down 5% on spring 2025