The families of the Disappeared have made an appeal for information that could help them recover their loved ones.
The Disappeared were a group of 17 people abducted, murdered, and secretly buried by republicans during the Troubles, mostly by the IRA.
Thirteen bodies have been recovered so far, with four outstanding.
The families of the Disappeared gathered at Stormont for their annual commemoration.
It includes a short walk and wreath laying on the steps of Stormont.
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The occasion coincides with the fiftieth anniversary of the disappearance of 19-year-old Columba McVeigh from Co Tyrone.
A dig is taking place at present for his remains at Bragan Bog in Co Monaghan.
His sister Dympna Kerr was among those at Stormont. "Columba is dead 50 years and is still lying in a bog," she said.
"That will never get easier, it can't get any easier can it, until we find him."
Also there was a niece of Joe Lynskey, a former Cistercian monk who went on to join the IRA.
He went missing in the summer of 1972.
In November 2024 the Independent Commission for the Location of Victims' Remains (ICLVR) exhumed a grave at Annyalla near Clontibret in a search for him.
DNA testing later confirmed that remains recovered were not those of Joe Lynskey.
A second search was undertaken in the same graveyard in May of this year during which further remains were recovered.
They too were tested and proved not to be those of Mr Lynskey.
Watch: Families of Disappeared during Troubles lay wreath
Maria Lynskey said there had now been several unsuccessful digs for her uncle, but she would have fully expected that he would have been found in Monaghan.
"I had everything arranged for Joe, funeral, undertaker, priests because everybody was positive, not just myself," she said.
She said having that hope dashed by the DNA results had been very difficult.
Also attending today's commemoration was the sister of Lisa Dorrian, a young woman abducted and murdered in 2005.
She had been at a party at a caravan site in Ballyhalbert, Co Down when she disappeared.
She is not on the official list of the Disappeared, but has the support of the families.
The remaining members of the Disappeared are Joe Lynskey, Columba McVeigh, former British soldier Robert Nairac and Seamus Maguire, who went missing in Co Armagh in 1976.
Anyone with information which may help with the recovery of the bodies is asked to contact the ICLVR in confidence at +353 1 602 8655, by email at secretary@iclvr.ie or by post to ICLVR, PO BOX 10827, Dublin 2, Ireland.
