A 36-year-old man has been arrested as part of the investigation into the activities of the Kinahan crime gang.
The man, who is from west Dublin, was arrested at 7.30pm yesterday on suspicion of conspiracy to murder after he arrived at Dublin Airport.
He is being detained under anti-gang legislation at Irishtown Garda Station in Dublin, and can be questioned for up to a week.
The man has been a target of the Garda National Drugs and Organised Crime Bureau for some time.
He is suspected of being involved in an attempt to kill a member of the Hutch gang, which is embroiled in a feud with the Kinahan gang that has so far cost 12 lives.