Psychopathic criminal brothers Leon and Jamie Griffin were behind the stab attack on convicted killer Derek 'Del Boy' Hutch in Mountjoy Prison, the Herald can reveal.
'Del Boy' (30), whose older brother Gary was murdered in Spain last month, was lucky to escape with his life in the attack that took place on Friday.
He was saved after three brave prison officers disabled the notorious Griffin brothers who targeted him with a number of jail-made 'shivs'.
Hutch has now been moved to high security Portlaoise Prison for his own safety.
Jail bosses have taken disciplinary action against Leon (25) and his younger brother Jamie (21), who are from the Iveagh Trust flats on Dublin's southside.
The violent brothers have lost their jail privileges and have been separated from each other, with Leon being transferred to Castlerea Prison, in Co Roscommon, and Jamie being to Wheatfield Prison in west Dublin.
Sources say that it is being investigated whether the brothers were paid a "five-figure sum" by the Christy Kinahan crime cartel to "slice Del Boy up" after information reached them that Hutch had been mouthing off that he was going to avenge his brother Gary's murder.
"The entire incident was caught on CCTV and there was no doubt that this was well planned.
"Leon and Jamie Griffin had been walking with Hutch when they just suddenly turned on him with the shivs they armed themselves with and they attacked him in a ferocious way.
"If was not been for the quick and brave actions of three staff members... this would have been a very, very serious situation. The Griffin brothers were tackled and disarmed and Hutch was left with only cuts to his arm," a jail insider said.
The incident has led to an explosion in gangland tensions in Mountjoy Prison with all three criminals involved moved to other facilities for that reason.
'Del Boy' is serving multiple sentences for offences such as manslaughter, possession of a firearm and robbery.
The Griffin brothers are considered among Ireland's most volatile inmates and have over 40 disciplinary reports between them from prison authorities in the past 18 months.
Sources say that Jamie has been far worse behaved than his older brother and has come to the attention of the authorities for breaches of discipline which include fighting and possession of contraband including illegal mobile phones.
The Griffin brothers were also involved in a savage assault on high-profile criminal Wayne Bradley in Mountjoy Prison last December. Bradley required three weeks of hospital treatment.