A man in his 20s is being questioned today by Garda detectives in Monaghan about the murder last October of 21-year-old south Armagh man Paul Quinn.
He was arrested in Cavan town early this morning and taken to Monaghan Garda station where he is being detained under Section 30 of the Offences Against the State Act.
He is the sixth man to be arrested by gardai in the Republic in connection with the beating to death of Mr Quinn in a barn in Co Monaghan.
The PSNI has also arrested and questioned six men in connection with Mr Quinn’s murder.
The family of Mr Quinn, who was from Cullyhanna, blamed the IRA for the murder.
The Independent Monitoring Commission found that former or current members of the IRA were involved in his killing but that this was contrary to the policy and instructions of the IRA leadership.