Detectives investigating the 2007 murder of Paul Quinn who was beaten to death by a gang in Co Monaghan have arrested a man.
Paul Quinn, 21, was attacked at farm buildings near Castleblaney in Co Monaghan.
Mr Quinn was from Cullyhanna in south Armagh.
His family blamed the IRA for the killing but this was denied by republicans.
The detained man, aged in his early 20s, was arrested in Dromad, Co Louth, this morning.
