Families of IRA victims abducted and murdered during the Troubles 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.