Gardai have arrested two men in Dublin over the kidnapping and torture of Quinn industrial Holdings (QIH) executive Kevin Lunney.
The men, who are both 38-years-old, are being questioned at Ballymun and Finglas Garda stations.
Mr Lunney (50) a director of QIH, was snatched near his Co Fermanagh home and brutally assaulted in September.
The father of six spoke out about the attack in a BBC Spotlight interview, describing how he had been slashed with a knife, doused with bleach and branded by his captors before being dumped on a remote road in Co Cavan.
Last week two men and a woman were arrested as part of the investigation. They were released without charge.
Earlier this month, key suspect Cyril McGuinness, known as "Dublin Jimmy", died from a suspected "cardiac event" after being handcuffed during a police raid in Derbyshire, England.
Gardai and PSNI have agreed to establish a landmark "joint investigation" into the intimidation campaign against QIH executives.
Gardai this morning appealed for anyone with information to contact them.
