Gardaí were alerted to a serious incident at a residential property in Tallanstown, Co Louth, this morning, Monday 29th September 2025.
Three people - two males and one female (all adults) - were found deceased at the scene.
The scene has been preserved for technical examination.
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The Offices of the Coroner and the State Pathologist have been notified.
A male, aged in his 30s, has been arrested and is currently detained at a station in the Garda North West Region under Section 4 of the Criminal Justice Act, 1984. Investigations are ongoing.
An Garda Síochána has no further information at this time.
