Gardaí have arrested six people during a series of raids across two counties targeting a Vietnamese crime gang.
A number of Polish nationals are also in custody following the major operation in which €600,000 worth of cannabis was found stuffed into a suitcase.
The arrests were part of an ongoing operation by gardaí from Pearse Street targeting drug dealing in the city centre.
Gardaí observed a drugs handover yesterday afternoon before later intercepting a car in Rathnew, Co Wicklow, at around 3pm.
After a search of the vehicle, they recovered €600,000 worth of cannabis stuffed into a suitcase.
A 42-year-old Polish man was detained at the scene and is currently being held at Pearse Street Garda Station under drug trafficking legislation.
A short time later, a van was intercepted on the Walkinstown Road in Dublin, which led to €85,000 worth of cash being recovered.
Gardaí arrested the 46-year-old Polish driver of the van, and he is currently being questioned.
A third follow-up search was carried out at a property in the Kilmainham area, which led to a small quantity of cannabis and €45,000 being seized.
A woman and three men, who are understood to be Viet- namese nationals and were in the apartment at the time, were arrested.
They were taken to Pearse Street and Kevin Street garda stations.
Sources said gardaí are investigating whether the drugs are linked to a Vietnamese crime gang operating growhouses around Dublin.
Those arrested are not known to gardaí and are suspected of being used as "gillies" by the crime gang. Investigations are continuing.