Gardaí have seized €350,000 in cash after searches of a number of people and vehicles in the west Dublin.
A spokesman said the seizure in Walkinstown was as a result of "ongoing investigations and intelligence-led targeting of serious criminal activity".
The searches were carried out by members the Garda Drugs & Organised Crime Bureau and the Special Crime Task Force that is at the forefront of tackling the ongoing gangland feud between the Kinahan and Hutch crime gangs in the capital.
Garda sources said the money seized belonged to the Kinahan gang.
Three men in their 40s were arrested for money-laundering offences during the Walkinstown operation. They were being detained under Section 4 of the Criminal Justice Act, 1984 at Crumlin and Ronanstown Garda stations.
To date 12 people have been shot dead as part of the dispute between the criminal factions; two in Spain, one in Meath and nine in Dublin. The killing of father-of-two Michael Keogh (37) in Dublin's north inner city in May brought to an end a five-month murder-free period since the murder Noel Kirwan, who was shot dead outside his partner's house in Clondalkin just before Christmas.