The victim, a man aged 60, was attacked when a group of people went to Whitecross Gardens, Moyross, to recover a drugs debt.
Gardaí are satisfied the victim had no involvement with drugs or any criminal activity. He may have been attacked as he knew the person who, it was believed, had run up a drugs debt.
The victim was attacked and stabbed a number of times when he opened the front door of his house believing trick or treat children were outside. On opening the door, a number of people tried to force their way in. In the ensuing altercation, he received a number of stab wounds.
Gardaí, who were quickly on the scene, got a description of a car seen speeding from the scene of the stabbing.
Within ten minutes of the assault, gardaí stopped a car in Ballinacurra Weston on the other side of the city and the occupants, two men and a woman, were arrested under Section 4 of the Criminal Justice Act.
Last night they were being held at Henry Street and Roxboro Road Garda Stations after the periods of detention were extended.
All three are known associates of the McCarthy Dundon gang.
The injured man was allowed home from the Mid-Western Regional Hospital after treatment.
Supt Frank O’Brien of Henry Street said: “This was a very serious assault and, following the arrests, further inquiries have been ongoing. These include looking through cctv and a number of items have been sent for forensic examination.”
Local sources in Moyross said the victim was a respected member of the community with no criminal involvement.