Gardaí say a search of woodlands in relation to the disappearance of women in the Leinster area has concluded.
The search for clues into the disappearances of Deirdre Jacob and JoJo Dullard got underway earlier this month.
However they say "nothing of evidential value" to the investigations was recovered from the wooded area in Co Kildare.
An Garda Síochána say it continues to keep the families involved updated on the progress of these investigations.
It says while the search has been completed, Gardaí remain at the scene to complete necessary site works.
The searches, at Usk Little near the Wicklow border, involved teams from the Garda Technical Bureau, Forensic Science Ireland and the Garda Dog Unit.
Gardaí say that during the course of the search, remnants of a previously undiscovered historical settlement were identified. The National Monuments Service have been notified.
Deirdre Jacob and JoJo Dullard
Deirdre Jacob, an 18-year-old trainee teacher from Newbridge, went missing shortly after 3.00pm on July 28th in 1998.
She had been visiting her grandmother a short distance from her home.
She was carrying distinctive black satchel-type bag, with long shoulder straps and the word 'CAT' in large yellow capital letters.
The last sighting of Deirdre was as she reached the gateway to her family home after a 25-minute walk from Newbridge town.
In August 2019, detectives on the case upgraded it to a murder investigation.
While 21-year-old JoJo Dullard went missing from Moone in Co Kildare on November 9th 1995.
She had been travelling home to Co Kilkenny from Dublin, but decided to hitch lifts after missing the last bus and only being able to travel part of the way.
After ending up in Moone, she rang a friend from a phone box to tell her where she was - then said a car had stopped for her.
Shortly after, a woman matching JoJo's description was seen leaning in the back door of a dark-coloured Toyota Carina-type car.
It was the last known sighting of her.
Last year Gardaí upgraded their investigation into her disappearance to a murder inquiry.