Lisa Dorrian went missing in February last year
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Three men have been arrested by detectives in connection with the murder of a County Down woman.
Two of the men are aged 18 and one is 23. Lisa Dorrian, 25 was last seen at a party on a caravan a site in Ballyhalbert, on 28 February 2005.
Despite extensive land and sea searches the body of the Bangor shop assistant has never been found.
Her family have offered a £10,000 reward for information leading to the recovery of her body.