A man in his 50s has been arrested in connection with the murder of south Armagh man Paul Quinn.
The arrest was made in the Dundalk area and the man has been taken to Monaghan Garda Station where he is being questioned about the murder.
This morning's arrest brings to 11 the number of people who have been detained by the gardaí and the PSNI as part of the ongoing investigation.
So far six people have been arrested in Northern Ireland and five in the Republic.
Mr Quinn, 21, from Cullyhanna, was beaten to death in an isolated Co Monaghan shed last October.
