As part of an intelligence-led operation targeting suspected drug traffickers, officers from Revenue’s Customs Service assisted by the Garda Drugs and Organised Crime Bureau, seized 72,000 ecstasy tablets.
The drugs have a street value of €720,000 and were discovered during searches of two residential premises in the north and south inner city.
Two men aged 42 and 43 and a 46-year-old woman were arrested and are currently detained at Store Street and Kevin Street Garda Stations. They can be held for up to seven days.
"These operations use advanced analytical and intelligence methods to disrupt criminals and dismantle their networks," a spokesperson said.
"Drug seizures play a critical role in targeting the livelihood of criminals and reducing their ability to carry out illegal activities. Drug seizures also help protect communities from the devastating impact of drugs and the associated criminality."