Dissident released over David Black killing

Second man remains in custody over murder of prison officer

One of two men arrested on suspicion of dissident republican activity as part of investigations into the murder of a prison officer in Northern Ireland has been released.

The 51-year-old was detained on Monday over the killing of David Black in a drive-by gun attack on the M1 last year.

A second man, aged 34, remains in custody at Cavan Garda Station.

Mr Black, a father of two, was shot dead as he drove from his home in Cookstown, Co Tyrone, to Maghaberry prison just outside Lisburn, Co Antrim.