Gardaí have arrested a man (60s) after the body of another man (30s) was found at a house in Dublin early on Saturday morning.Gardaí and emergency services responded to a call from a house on Brookwood Heights, Artane, shortly after 12.30am.The man in his 30s was treated at the scene but was pronounced dead a short time later.The man in his 60s was arrested at the scene and is being questioned at a Garda station in north Dublin.The body remains at the house, which will be examined by Garda technical staff. A coroner and the Office of the State Pathologist have been notified, and a postmortem will be arranged.A senior Garda officer and family liaison officer have been assigned to the case, with an incident room set up at Clontarf Garda station.