A man in his 20s was arrested and is currently being held at a garda station in Dublin.
Shortly before half 11 last night gardai and emergency services attended a house in Tobersool in Balbriggan.
A man in his 70’s was found unresponsive and was declared dead at the scene. Its understood he was assaulted.
A man in his 20s was arrested and is currently being held at a garda station in Dublin.
The scene has been preserved and the office of the State Pathologist has been notified.
Gardaí are appealing for witnesses to come forward, particularly those who were in the Tobersool area between 10pm and 11.20pm last night.

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