A 49-year-old man and a 34-year-old woman arrested by detectives investigating the murder of Lisa Dorrian have been released on bail pending further enquiries.
Detective Superintendent Jason Murphy, who is leading the investigation, said detectives had earlier been granted an additional 12 hours to question a 49-year-old man and a 34-year-old woman who were arrested on suspicion of murder.
This week a large scale search operation was carried out at the caravan park in Ballyhalbert where Lisa was last seen alive, as well as at the disused airfield behind.
Lisa was killed after being at a party in Ballyhalbert Caravan Park on a cold February night in 2005. Her body has never been found.