A teenager and four men in their 20s and forties are being questioned after Gardaí discovered another man with stab wounds at a house in Drogheda.
The injured man, who is believed to have been the victim of an earlier kidnap attack, was brought to hospital.
His wounds have been described as non-life threatening.
Gardaí entered the house at the Moneymore Estate at around 9.00pm last night, after an alert was raised on Sunday evening.
The arrests were made a short time later.
All five are being detained under Section 30 of the Offences Against the State Act at Garda stations in Drogheda and Dundalk.
It comes as Gardaí investigate a number of incidents in the Drogheda area in the past few days, which local reports are connecting to an on-going feud between rival gangs.
Councillor Richie Culhane says some people are afraid to come forward.
"Criminal organisations are basically taking over certain estates and causing people to be very, very fearful.
"People are fearful to come forward with information, for example - it was never something that happened in the town, apart from when the IRA were at their highest during The Troubles.
"That fear is very, very evident at the moment".