Two men arrested earlier this week in Dublin have been released without charge.
Gardaí investigating serious feud-related organised crime in the city made the arrests in the north inner-city and Finglas on Wednesday.
A total of five men were in custody during the week in connection with the investigation.
All five men, aged in their 20s and 30s, have now been released without charge.
A file is being prepared for the director of public prosecutions.