The Sinn Fein President is calling on anyone with information about those killed and secretly buried by the IRA almost 30 years ago to come forward.
Gerry Adams has met recently with the Commission for the Location of Victims Remains.
He says the families had suffered a grave injustice and commended their campaign for justice.
The Sinn Fein leader says the families have a fundamental right to bury their loved ones and it is vital that they have all the information possible to make their efforts a success.
“If there is any other information available which might help I am appealing again for those with it, to bring it forward now” Mr. Adams said.
“I also want to acknowledge once again the grave injustice inflicted upon these families and to express my deep regret about this. I want to thank everyone who has worked to help the families. They deserve our full support”.