Sinn Féin Justice spokesperson Pádraig Mac Lochlainn has dismissed as untrue a report that four senior party figures held an inquiry in 2006 which dealt with a litany of cases involving sexual and physical abuse by IRA men.
A report in the Sunday Independent said the IRA man alleged to have sexually abused Paudie McGahon also allegedly abused a 12-year-old boy having been forced to move from Northern Ireland to the Republic by a Provisional IRA 'kangaroo court'.
However, speaking on RTÉ's The Week in Politics, Mr Mac Lochlainn said this was untrue.
Mr Mac Lochlainn also criticised so-called 'kangaroo courts' and called on anyone with information to come forward.
The Sunday Independent report also says it has seen a document which suggests there are up to 100 IRA abusers.
Northern Ireland Deputy First Minister Martin McGuinness dismissed the report as "scurrilous".
Speaking on RTÉ's This Week, Mr McGuinness challenged anyone with information to support such a claim to give it to gardaí and the PSNI.
He said Sinn Féin was seeking legal advice on the allegations.
Mr McGuinness also said he had no knowledge of an allegation published in the Sunday Independent that the IRA man alleged to have sexually abused Mr McGahon also abused two teenagers in Derry within the decade after that assault.
Mr McGuinness said gardaí and the PSNI have the responsibility to investigate such allegations and said Sinn Féin members with any information have a responsibility to cooperate with police investigations.
Mr McGuinness said he had no reason to doubt anything that Mr McGahon had to say.
He said when somebody was the victim of abuse and came forward with their testimony that had to be taken very seriously indeed by everybody.
However he said people within the political process and in the media were attempting to exploit the terrible trauma that a number of victims had gone through.
Asked about a list of names of alleged abusers provided to Sinn Féin president Gerry Adams in November, Mr McGuinness said it would not be unusual for people to come forward after hearing Sinn Féin leaders asking people who had information or who could assist to come forward.
Mr McGuinness said it was the responsibility of police services to investigate allegations of abuse, but it was the responsibility of Sinn Féin members and society as a whole to cooperate with the police.