More than €2 million of drugs have been seized in related raids by gardaí in Laois and Dublin.
A man has been arrested in connection with the seizure and is being detained under the Criminal Justice (Drug Trafficking) Act 1996 at a Garda station in the Dublin metropolitan region.
The raids were part of investigations under Operation Tara targeting drug-trafficking networks.
Officers from Garda National Drugs & Organised Crime Bureau were involved in the raids with help from the Clondalkin Drugs Unit.
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They first intercepted a vehicle on the M7 in Co Laois on Friday.
About €100,000 of suspected cocaine was discovered and seized. A man in his 30s was arrested at the scene.
A follow-up search at a home in west Dublin led to the discovery of an estimated €160,000 cannabis, €1.2 million ketamine, €530,000 cocaine and €210,000 diamorphine.
Cash and a number of items were also seized by gardaí.
The seized drugs, with a total estimated street value of €2.2 million, have been sent to Forensic Science Ireland for analysis.
Gardaí said investigations were continuing.
