A woman (50s) has died after an assault in Portlaoise, Co Laois.Gardaí are investigating the incident at a domestic residence at Church Street shortly after 12:30pm.Emergency services attended, but the woman was pronounced deceased at the scene.The State Pathologist has been notified and a post-mortem examination will be arranged in due course. A man aged in his 70s was arrested and is currently detained at a station in the Garda Eastern Region under Section 4 of the Criminal Justice Act, 1984. The scene is currently preserved for technical examination.