Police are investigating a serious injury road traffic collision at Valley Road, Saundersfoot, some time before 1.45 am on Saturday.
A black Ford Ka motor car left the road and the driver and passenger were conveyed to Withybush Hospital, Haverfordwest, by ambulance.
Anyone with information regarding this incident is asked to contact PC Huw Evans at Haverfordwest Traffic Department on 0845 330 2000.