Gardaí have arrested three people over the abduction and torture of Quinn Industrial Holdings (QIH) director Kevin Lunney.
Two men and a woman are being held in custody after raids were carried out in counties Cavan, Longford and Dublin.
Gardaí said: "A male in his 20s and a male in his 40s are currently being detained under section 50 of the Criminal Justice Act, 2007. A female in her fifties is being held under Section 30 of Offences Against The State Act, 1939."
Mr Lunney was kidnapped and attacked on September 17.
Mr Lunney was taken from his home in Fermanagh by a group of four masked men, before being dumped across the border and discovered by a farmer.
In an exclusive interview, Kevin Lunney, a senior executive in Quinn Industrial Holdings tells Jim Fitzpatrick about his ordeal following his abduction and torture by a gang in September.#SpotlightNI pic.twitter.com/ERHHsfmvRZ
— BBC Spotlight NI (@BBCSpotlightNI) November 5, 2019
The men repeatedly told Mr Lunney he would have to leave his role at the company and made threats to his family including his young daughter.
Read More: New threat against QIH directors by gang behind torture of Kevin Lunney
Mr Lunney, a father of six, had his leg broken, the words QIH cut into his chest, his fingernails cut down to the quick and was doused with bleach in a two-and-a-half hour ordeal.
Read More: Roots to fallout which saw Sean Quinn leave role at Quinn Industrial Holdings
A suspect in the investigation died after he took ill during a police raid in England last Friday.
Cyril McGuinness (54) is believed to have suffered a heart attack as police searched his Derbyshire home.
That search was part of a joint police operation across the UK and Ireland.
Garda said it continued "to appeal to any person who has any information, no matter how insignificant it appears, on this vicious criminal attack or any other criminal activities which have taken place in the Cavan/Fermanagh border area over recent years to contact An Garda Síochána at Cavan Garda Station 049 4368800, the Garda Confidential Line 1800 666 111, or Crime Stoppers on 1800 25 00 25 or any Garda Station."
Tony Lunney describes the night his brother was abducted
Read more:
- QIH chief executive Liam McCaffrey: For two hours we didn't know if Kevin was alive or dead
- Kevin Lunney is recovering well from injuries inflicted by masked men
- Sean Quinn: Attacks are not being done in my name
