Families of IRA victims abducted and murdered during the conflict in the North are to march at Stormont tomorrow.
Relatives of the nine so-called Disappeared will carry a black wreath with nine white lilies to remember the dead on All Souls Day.
Fresh tests were carried out in Co Monaghan last week where Columba McVeigh, 17, from Dungannon, Co Tyrone, was believed buried by republicans after being labelled a security force informer in 1975.
North Belfast priest Fr Aidan Troy said: "What we are doing on All Souls Day is in memory of their loved ones and it is also a reminder of the obligation on all of us to do what we can to bring closure for the families."
The last search for Mr McVeigh was carried out in 2003 by Garda excavation teams on bogland at Bragan Mountain close to the Tyrone-Monaghan border.
Among the IRA's other victims were Robert Nairac, 29, an undercover soldier who disappeared from a south Armagh pub in 1977, and Charlie Armstrong, 55, who vanished on his way to Mass in 1981.
Other missing remains are those of: Kevin McKee, from west Belfast, who disappeared along with Seamus Wright, 25, in 1972; Brendan Megraw, 23, kidnapped in 1978 from west Belfast; Gerard Evans, 24, disappeared on his way home from Crossmaglen in south Armagh in 1979; Danny McIlhone, disappeared from Dublin in 1981; Seamus Ruddy, 33, disappeared in 1985.
Another, unconnected, victim represented will be Lisa Dorrian, 25, who went missing from a Co Down caravan in February 2005.