Irish police are conducting searches in rural farmland in the Republic of Ireland relation to the 2007 IRA murder of Co Armagh man Paul Quinn.
Cullyhanna man Paul Quinn was beaten to death and killed in a barn in Co Monaghan in October 2007.
The searches come after a man aged in his 50s was arrested on Thursday morning in Castleblaney, Co Monaghan and is currently detained at Carrickmacross Garda Station.
Gardai have also begun a search operation on lands near the area as part of the investigation.
A spokesperson said no further information is available at this time but investigations are ongoing.
Twenty-one-year-old Mr Quinn was beaten to death by a gang of men after he was lured to a remote farm near Castleblaney.
His family has the IRA from south Armagh in the past for the murder but this has been denied by republicans.
Mr Quinn was found beaten at farm buildings in Tullycoora, near Castleblayney, in October 2007.
He died in hospital several weeks later.
Several people have been arrested and questioned on either side of the border, but nobody has been charged in connection with the killing. It was confirmed at an inquest by Deputy State Pathologist Dr. Michael Curtis that the cause of death was multiple injuries due to blunt force trauma.
His family said he had been involved in a dispute with individual IRA members.
Stephen and Breege Quinn, the dead man's parents, from Cullyhanna, were notified of the Garda operation.
"We are delighted and it just goes to show that the guards are not giving up and are still at it," Mr Quinn said.
"It's a long time but it gives us a lift that they are still working and going on ahead with the investigation.
"It gives you a bit of hope. We are very grateful."
Source Irish Independent