Sinn Féin has said there was no republican involvement in the death of Paul Quinn near the border over the weekend.
Mr Quinn, who was from Co Armagh, was beaten by a gang of up to eight men after being lured to a farm at Tullycoora near the village of Oram on Saturday evening.
The Sinn Féin president, Gerry Adams, has urged anyone with information about Paul Quinn's death to bring it to the attention of the police.
But a former Sinn Féin councillor has rejected claims that there was no republican involvement in the killing of Paul Quinn at the weekend.
Speaking on RTÉ Radio's Today with Pat Kenny, Jim McAllister said he believed the IRA was involved.
Some Unionist politicians suggested the killing could have repercussions for the Northern executive.
However Taoiseach Bertie Ahern stated he did not believe the killing would have implications for the peace process.
Mr Ahern said he did not know what the background of the people involved was, but said the killing had been condemned by Sinn Féin representatives who had urged people to co-operate with the police.
A murder inquiry is expected to begin in Monaghan after a post mortem examination is completed on the body.
The 21-year-old's family said in a statement last night that they believed the Provisional IRA were responsible for his death because he refused to leave the area after a dispute with IRA members.
A gang of seven or eight men beat Mr Quinn after luring him to a farm at Tullycora near the village of Oram on Saturday evening.
Mr Quinn was conscious when he was discovered by gardaí, but died two hours later in hospital.
Gardaí say they are keeping an open mind on why Mr Quinn was attacked, but said paramilitary involvement could not be ruled in or out at this early stage of the investigation.
