A man remains in a serious condition after a crash last week.
Police have reissued an appeal for information about the collision between Richmond and Catterick Garrison.
The incident took place a week ago on Thursday, March 24, off Richmond Road near the Sandbeck Plantation.
A dark-coloured Alfa Romeo was reported to have hit a tree after leaving the road at around 11.30pm.
All four occupants of the vehicle sustained injuries and were taken to hospital.
Three have since been treated and released, however one remains in a serious condition.
A man in his 20s is currently assisting officers with their enquiries.
A North Yorkshire Police spokesperson said: The investigation is ongoing, and anyone who saw the Alfa Romeo in the moments leading up to the collision, or has any other information or dashcam footage that could help the investigation, should contact North Yorkshire Police on 101, select option 1 and quote incident number 12220050274.
You can also email the officer in the case, DC 1073 Sarah Burton of the Major Collision Investigation Team, at Sarah.Burton@northyorkshire.police.uk