A man in his 20s has been killed after he was assaulted in Co Mayo.
This assault happened at a house in Swinford in Co. Mayo last night at around 11 pm.
A man in his 20s was pronounced dead at the scene.
A man in his 30s has been arrested and is currently being held in Castlebar Garda Station.
The body of the victims remains at the scene this morning which is currently preserved for a technical examination and the services of the State Pathologist have been requested.
Gardaí are appealing to anyone who may have information in relation to this incident to come forward.
Gardaí are also appealing to anyone who may have witnessed any unusual activity in Swinford town between the hours of 8 pm and 11.15 pm yesterday evening to come forward.