Irish police have confirmed that a file is being prepared for the Director of Public Prosecutions over the alleged sexual assault of two males in County Louth in the 1990s.
One of the complainants is Paudie McGahon, 40, who has alleged that he was raped by an IRA man when he was 17.
His allegations were reported on the BBC Spotlight programme last night.
Mr McGahon said he wanted the republican movement to acknowledge the truth of his story.
Earlier, Sinn Féin leader Gerry Adams said he believed Mr McGahon's story about being raped, however, he did not clarify whether he believed his claims that he was subjected to an IRA "kangaroo court".
He told the BBC's Spotlight programme that an IRA man, from a well-known republican family in Belfast, abused him and then threatened him to remain silent.
He said he was later subjected to an IRA "kangaroo court" after a Sinn Féin representative was told of the allegations.
Mr McGahon and another man allege the offences took place at an identified location in County Louth.
Complaints were made to police in Drogheda towards the end of last year.
On Wednesday, Ch Supt Pat McGee confirmed that "the investigation is ongoing and a file will be sent to the DPP in due course".
Earlier, Mr Adams said he only found out about the incident in 2009 when he was told by Sinn Féin Louth TD Arthur Morgan.
He said Mr McGahon's alleged attacker should come forward.
When asked on Wednesday by Irish broadcaster RTÉ about Mr McGahon's claims that he was subjected to internal IRA inquiries, Mr Adams said: "I don't know - the fact is there is a Garda [police] investigation under way."
In the BBC programme, Mr McGahon said the IRA offered to kill the alleged rapist but instead expelled him to England.