The father of a County Down woman who has been missing for six days has made an emotional appeal for assistance in finding her.
Lisa left her handbag and personal belongings behind at a party
Detectives investigating the disappearance of 25-year-old Lisa Dorrian from Bangor have said that they could not rule out a crime.
Air and land searches have been carried out along the Ards Peninsula.
Her father John said the family were still hopeful she would turn up safe and well.
"If she is out there and sees all this involvement with the police and the media, it doesn't matter. Don't worry about it, come back," he said.
Police have said they plan to stop traffic in Ballyhalbert at 0500 GMT on Monday, exactly one week since Lisa was last seen.
Her sister Joanne said she hoped the operation would help jog people's memories.
"They'll be asking everybody along the road, giving out leaflets and basically just trying to find any new leads," she said.
Miss Dorrian went missing after a party at a caravan park in Ballyhalbert.
Police have said some of the people at the party have come forward to help with their inquiry.
On Saturday, police searched ground near the caravan park, which is on the site of a disused wartime airfield.
Miss Dorrian's sisters and friends also joined in with yesterday's operation.
Miss Dorrian left her handbag and personal belongings behind her at the party and has not made contact with friends or family since.
The missing woman, who is understood to be a shop assistant, is 5ft 4ins in height, with blonde hair.
She was wearing a white short sleeved top with lettering on it, cream tracksuit bottoms and a pair of white furry moon boots.
The police want anyone with information to contact detectives at Newtownards police station.