A man has been arrested as police investigate a serious assault which was reported in Market Square, Fishguard, at 2.50am on Sunday, October 20.
A 20-year-old man remains in hospital having suffered multiple head injuries which are potentially life changing.
Following an appeal for information, a 35-year-old man has been arrested on suspicion of assault causing grievous bodily harm. He is currently in police custody.
Police have thanked everyone who got in touch with information to help the investigation.
Enquiries are ongoing.