Gardaí received a call about an incident at the apartment shortly before 2pm. On arrival at the scene Gardaí discovered the body of a two year old boy. The boy was later pronounced dead by a doctor and the body remains at the scene.
The area has been preserved for technical examination and the office of the State Pathologist has been notified. A woman in her 40s was arrested at the scene and is detained at Dun Laoghaire Garda Station.