Three held over Black murder
Three people have been arrested in the North and in Dublin in connection with the murder of prison officer David Black last month.
Mr Black (52), was shot as he drove to work on a motorway in Co Armagh on November 1st. Dissident republicans claimed responsibility.
The father-of-two worked at the high security Maghaberry jail in Co Antrim.
A PSNI spokesman said a man aged 36 was arrested today in Co Tyrone and taken to Antrim police station for questioning.
Separately, gardaí attached to the Special Detective Unit at Harcourt Square in Dublin arrested a 44-year-old man and a 31-year-old woman in Dublin this morning as part of the same murder inquiry.
They are detained under the provisions of section 30 of Offences of the State Act 1939 at Ballymun Garda station.
Mr Black was the first prison officer murdered in Northern Ireland for 20 years.
Additional reporting: PA