Three men, aged 36, 39 and 45, sustained head injuries and lacerations believed to have been caused by knives and other weapons during an altercation in Co Fermanagh last night.
Windows at the property in the Mill Line area, Derrygonnelly were also smashed.
The 39-year-old man has been arrested on suspicion of grievous bodily harm with intent and remains in custody at present.
Anyone who was in the Mill Line area at around 8.20pm last night and witnessed what happened is asked to contact police in Enniskillen on 101, quoting reference 1881 28/02/23. Information can also be provided using an online form via http://www.psni.police.uk/makeareport/.