Gardaí are continuing to question a man about the murder of a 43-year-old inmate at Cloverhill Prison in Dublin yesterday morning.
Martin Salinger, from Ballyfermot in Dublin, was found fatally injured in a cell after prison officers responded to a disturbance in the early hours of yesterday morning.
An inmate, aged in his 30s, was arrested yesterday afternoon on suspicion of murder.
He is being detained at a west Dublin garda station and can be questioned for up to 24 hours.