Officers are appealing for witnesses to a collision on the A456, Burford in Herefordshire.
The collision happened around 1.15am on Saturday morning (7 October) when a black Audi A1 was travelling from the general direction of Tenbury towards Brimfield, just before the junction of Bleathwood lane.
The car appears to have lost control and collided with a fence and telegraph pole before turning onto its roof.
One person from the car was taken to the hospital and remains in a critical but stable condition.
Officers carrying out enquiries into the collision are appealing for witnesses, including any motorists on the road around the time of the collision with dash-cam footage.
Anyone with information is asked to contact Sergeant Poucher by email andrew.poucher@westmercia.pnn.police.uk or by calling 07929 800829
Alternatively, information can be shared anonymously with the independent charity Crimestoppers on 0800 555 111 or by visiting www.crimestoppers-org.uk
