Gardai have launched a murder investigation after a man was found dead in Cabra following what is described as a "frenzied attack".
The body of Kevin Molloy (42) was found in a pool of blood at his home at Glendhu Road on Sunday morning.
Mr Molloy is believed to have been dead for a number of days.
Sources say that the single man died of horrific head injuries which were more than likely caused by "a frenzied attack".
The gruesome discovery was made by the dead man's relatives who had become concerned after they had no contact with him in recent days.
Gardai believe that Mr Molloy died from blunt force trauma to the head and had been dead for a number of days.
The victim was not previously known to gardai and detectives are searching for a motive for the murder.
Officers will now try to piece together the final days of his life but the investigation has been hampered because they do not know when exactly he was assaulted.
The unemployed man suffered "catastrophic injuries" and lost a large amount of blood.
Gardai carried out a painstaking forensic examination of the house where Mr Molloy lived alone.
State Pathologist Marie Cassidy examined the body in the house before it was removed for the post mortem.
Neighbours said Mr Molloy was a quiet man who kept to himself and had become somewhat reclusive in recent years. He was rarely seen in public in recent times.
Mr Molloy had lived in the house in Cabra for the past eight years.
Neighbours said they thought he was a former engineer or ran a business of his own, but he increasingly withdrew from social contact in recent years.
"I haven't seen Kevin since before Christmas, but he would come and go. You would never hear a peep from him.
"We certainly didn't hear any disturbance at the house or anything," a neighbour told the Herald.
Other neighbours said they thought Mr Molloy was originally from Cabra or Drumcondra.
"I think poor Kevin may have fallen on hard times in recent years. There used to be a van in the driveway but I haven't seen it for a few years now," said a local resident.
Gardai in Cabra launched a murder investigation yesterday afternoon and have begun tracing the last known movements of the country's latest murder victim.
"It is a very tragic case but everything will be done to catch the person or persons responsible," a garda source said.
Officers continued with their house-to-house inquiries yesterday in the area.
Gardai said yesterday evening that the body had still not been formally identified.
DNA tests were being carried out and the results were expected sometime today.
A garda spokesman said: "The scene at the house remains preserved for technical examination."
He said Prof Cassidy carried out a post mortem at Dublin City Morgue.
The results of the procedure "are not being disclosed for operational purposes" at this time he said.
Anyone with information is asked to call 01 6667400 or any garda station.