DETECTIVES in the Republic have arrested two men over the murder of prison officr David Black over a year ago.
Searches were carried out in the Republicin in a planned operation against dissident republicans.
The operation centred on the Leitrim and Cavan areas and two men, 51 and 34, have been arrested.
David Black was shot dead by dissident republicans during an ambush on the M1 motorway on November 1, 2012.
A dark blue Toyota Camry with a Republic of Ireland registration, 94 D 50997, pulled alongside and a number of shots were fired, killing Mr Black.
The Toyota Camry was found burnt out in the Inglewood district of Lurgan a short time later.
The father-of-two was on his way to work at Maghaberry Prison when his car was riddled with automatic gunfire.
Mr Black, 52, was the first prison officer to be murdered in Northern Ireland in almost 20 years.
Leading Lurgan dissident republican Colin Duffy was later arrested over the murder but was released without charge.
Police applied to have his detention at the serious crime suite in Antrim extended.
However, a judge refused after police refused to disclose “intelligence information” it was relying to link him to the offence.