Five people face extradition after being arrested during a series of raids this morning targeting organised crime in the Dublin region.
A total of 21 people were arrested in over 50 searches today.
They were carried out as part of Operation Wireless, which was established by Garda Commissioner Martin Callinan.
Four men and a woman were arrested on foot of European Arrest Warrants.
The woman and one of the men were taken to Blanchardtown Garda station, while the three men were being held in Kilmainham, Bridewell and Ashbourne Garda stations.
They are wanted in other European countries, including France, Poland and Lithuania, for a variety of alleged crimes.
Other arrests were made for drug and theft offences.
A Garda spokeswoman said the operation, which involved personnel from the Criminal Assets Bureau, the Garda Bureau of Fraud Investigation, National Bureau of Criminal Investigation, Garda National Drug Unit and regional detective units, is ongoing.