Two people have been arrested by detectives investigating the murder of Martin Conlon in Armagh last week.
A 30 year-old woman and a teenage boy were detained in the Armagh area this afternoon.
The 35 year-old victim was found with gunshot wounds to the head outside Keady last Monday. Detectives are looking at whether Mr Conlon was killed by dissident republicans, with whom he had links.
Mr Conlon was released recently from Portlaoise prison after serving four year term.