A man, understood to be the 42-year-old son of the couple found dead at their home in Carndonagh yesterday morning, is still be questioned by Gardaí in Buncrana.
The bodies of Kathleen and Jimmy Cuddihy, both aged in their 70s, were discovered by their elder son James and a local man who had been carrying out building works at the house in Churchtown shortly after 9am.
Although Gardaí have not specified details, it is understood that the pair suffered violent deaths and that a hatchet was found at the scene.
A Garda spokesperson confirmed that the man remains in custody at Buncrana Garda station.
Post mortems are being carried out by State Pathologist Dr Marie Cassidy.
The scene at the house on the Mountain Road is still cordoned off.
The retired couple, who had four children, were widely known and respected through both their jobs and their involvement in community organisations.
Mr Cuddihy, a native of Kilkenny, moved to Carndonagh in the 1960s and taught metalwork at Carndonagh Community School.
He was a past captain of Ballyliffin Golf Club, and tribute was paid to his “jovial and bubbly character” on the club’s website.
Mrs Cuddihy, née Deery, came from Malin, and was a nurse who worked with the ambulance service.
She was also a tireless fundraiser for patient services at Letterkenny General Hospital
Cllr Albert Doherty, a neighbour, said: “Our whole community is just shocked to the core. We’re completely devastated and stunned.
“It’s just so tragic. People here are still struggling to come to terms with the news. They were loved by all. They were really great people.
“Our sincere thoughts, sympathy and prayers are with the family.”