A criminal narrowly escaped with his life when he was repeatedly stabbed after a double-cross at a so-called peace meeting in Co Dublin.
The victim, who is in his 30s, was attacked -- along with his two brothers -- by a group armed with Stanley knives at a house in the Chieftains Way estate in Balbriggan.
The incident is part of a bitter localised feud that has been rumbling for months.
One source said it was "like something out of a Reservoir Dogs movie".
Gardai said no arrests have yet been made, but the injuries suffered by one of the attacked men were so bad that he needed extensive surgery at Beaumont Hospital.
The attack happened last Friday and has led to an escalation of tensions between the feuding factions over the Christmas period.
The Herald has learned that the violence began when a criminal who claims he is in the Continuity IRA called for a "peace meeting" between the warring factions.
However, when one faction entered the house, they produced Stanley knives and attacked three criminal brothers when they tried to shake hands.
A source said: "They cut them up really bad -- they were stabbed in the stomach, in the back, in the legs -- it was an absolute horror show, no doubt about it.
"One brother got it worse than the others -- he was the fella who needed surgery in Beaumont Hospital.
"He lost a huge amount of blood in the incident."
The situation has now been further complicated, with senior dissident republicans understood to be furious that the man who organised the sham peace meeting has been using the name of the IRA.
It is understood that the brothers managed to escape the house to a nearby halting site, and it was while they were there that gardai were alerted to the situation.
The three-man gang who attacked them also fled from the house.
There has been a large number of violent incidents connected with the feud, including one in which a van mounted a footpath and almost knocked down a number of children after it was attacked by a rival faction.
At the centre of the feud is a dispute over drugs, with a Traveller crime kingpin who has taken over from slain drug dealer John Paul Joyce exerting pressure on a criminal from Drogheda who owes him a four-figure debt.
The crime kingpin is a much-feared 31-year-old who lives in a large house in north Co Dublin and has a lengthy record of previous convictions to his name.