Third man arrested in connection with prison officer murder

Gardaí investigating the murder of a prison officer in Co. Armagh yesterday have arrested a 29-year-old man in Co. Leitrim.

It brings to three the number of people being held in connection with the death of 52-year-old David Black, after police in the north arrested two men - including prominent republican Colin Duffy.

Belfast-based security correspondent Alan Murray said that Mr Duffy has faced a number of serious criminal charges over the years.