A man arrested in connection with the murder of Paul Quinn in Co Monaghan last year has been released from Garda custody.
The 50-year-old man was arrested in the Dundalk area on Thursday and was questioned by detectives at Monaghan Garda station.
He was released shortly after midnight, a Garda statement said.
Since late July, a total of 11 people have been arrested in connection with the beating to death of Mr Quinn in a barn in Co Monaghan.
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Six were arrested in Northern Ireland and five in the Republic. No one has yet been charged with his murder.
Mr Quinn (21), from Cullyhanna, south Armagh, was beaten to death by a masked gang on October 20th, after he was lured to empty farm buildings in Castleblayney.