Sinn Féin has called on the Irish and British governments to deploy a forensic scientist to recover the remains of people abducted and murdered by the IRA.
A Sinn Féin spokesman said party had been pressing officials in Dublin and London to use a forensic scientist with specific skills for locating the bodies of missing people who the IRA have admitted kidnapping and killing.
The spokesman said: "We continue to work to seek the return of the remains of those killed by the IRA.
"For some time now, for up to two years, we have been pressing the two governments to bring in a forensic expert in this field to assist."
Among the bodies still to be located is that of 17-year-old Columba McVeigh from Donaghmore, Co Tyrone, who was kidnapped in 1975. His remains have not been recovered despite searches in County Monaghan.
In August 2003 the remains of mother-of-10 Jean McConville (37) were discovered after a series of extensive searches of Shelling Hill Beach in Co Louth. She was abducted and murdered by the IRA after she went to the aid of a British soldier wounded outside her front door in Belfast in 1974.
Republicans are certain they have given the Commission for the Recovery of Victims' Remains accurate information about where the bodies are. However excavators and other equipment have not been able to locate some of the bodies.
In October 2003 the IRA apologised for the grief suffered by the families of the disappeared.
PA