A murder inquiry is under way into the deaths of two elderly brothers in Castlebar in Co Mayo.
The bodies of 76-year-old Jack and 69-year-old Tommy Blaine were found by a care worker at their house in New Antrim Street.
Post mortem examinations were conducted by State Pathologist Dr Marie Cassidy.
Both men sustained injuries before they died.
A 26-year-old man was arrested in Castlebar by gardaí investigating the killings.
He is being detained at Castlebar Garda Station where his period of detention has been extended.
Technical examinations at the brothers’ house continued well into last night as forensic experts combed the area.
Paul Dunne, a cousin of the men, described them as "innocent, happy men" who did not deserve to die in such circumstances.
Mr Dunne said they were inoffensive people who only wanted to get on with their lives.
The brothers moved to Co Mayo to care for their mother around 30 years ago.
Locals say they were vulnerable, well-loved men who were held in high regard by people in the town.