Police in the North have arrested two men in connection with the murder of Paul Quinn in Co Monaghan last year.
A total of 16 arrests have now been made on both sides of the border in connection with the case, but nobody has yet been brought to court.
Mr Quinn, a 21-year-old from Cullyhanna in Co Armagh, was beaten to death after being lured to a remote farm in Monaghan in October 2007.
His family say republicans in south Armagh were behind the killing.