Six men have been arrested in connection with the investigation into the murder of Armagh man Paul Quinn.
The 21-year-old from Cullyhanna was beaten to death in an isolated Co Monaghan barn last October.
The six men were arrested during a planned operation this morning involving the Garda and members of the PSNI.
Three men – two in their 50s and one in his 20s - from the Crossmaglen and Cullyhanna areas are being questioned by PSNI detectives in Antrim.
The other three men – aged in their 20s and 30s - are being held at Garda stations in Monaghan and in Carrickmacross under Section 30 of the Offences Against the State Act.
A number of items were also seized during the operation.
In May, the Independent Monitoring Commission found that the IRA organisation did not kill Paul Quinn although "local members or former members" of the republican group were involved in his murder.
The inquest into Mr Quinn’s death was opened briefly before being adjourned last month.
Speaking afterwards, his father Stephen said he was hopeful the killers will be caught and pleaded for anyone who could help the ongoing inquiry to get in contact with the authorities.