Detectives investigating the disappearance and murder of Lisa Dorrian in Co Down earlier this year have arrested a 22-year-old man.
The 25-year-old woman disappeared after a party in a caravan in Ballyhalbert on 28 February.
Police believe she was murdered by loyalist terrorists who then dumped her body.
No trace of Ms Dorrian has been found, despite air, land and sea searches.
