The incident happened late last night.
A man in his 80s has been arrested after a man in his 60s was shot dead in Co Mayo late last night.
The incident happened at around 11.55pm in Aghamore near Ballyhaunis.
The victim was pronounced dead at the scene, which is currently preserved for a technical examination.
A man in his 80s has been detained in relation to the incident and is being held at Castlebar Garda station.
Gardaí are appealing for anyone who may have information that can help them with the investigation to contact Claremorris Garda Station on 094 937 2080, the Garda Confidential Line on 1800 666 111 or any garda station.