Two elderly brothers have been brutally beaten to death in their home.
The pensioners were attacked in their house during a botched burglary.
The bodies of the men, aged 69 and 76, were discovered in Castlebar, Co Mayo, at 7am today.
One of the victims was found inside the house on New Antrim Street by a home help nurse, while the second body was discovered in the backyard.
The men sustained "horrific injuries" according to one source, and blood was found at the scene.
"It's yet to be established exactly the cause of death,” a source told the Herald.
The level of violence used was described as “highly unusual and very disturbing”.
A Garda spokesman said: “The scene has been preserved for a technical examination.
“The services of the State Pathologist and the Garda Technical Bureau have been requested.”
Gardai are attempting to trace relatives before releasing the men's names.
Michael Kilcoyne, an Independent councillor in Castlebar, said the older community in the town were in shock over the deaths.
"It's a terrible tragedy for the town. People, in particular older people, are in fear this morning and whatever resources the gardai need should be made available to them without question," he said.
Another councillor, Ger Deere, told the Herald: “I knew them very well. They were well known around Castlebar.
“They were part of the landscape, to be honest with you. They were gentlemen.”