A man was knifed to death in a frenzied attack over a late night chess game, detectives believe.
Irish police were called to the scene of the bloody killing in a suburb of north Dublin at around 1:50am.
A 39-year-old researcher, who owned the house at Beech Park Avenue, Castleknock, was found with multiple stab injuries inside.
They believe a violent row erupted over a chess move and spiralled out of control.
Another man - aged 34 years and understood to be from Palermo in Italy - was arrested at the scene.