Around €70,000 worth of heroin was found hidden in wheels in Dublin Airport.
Officers made the massive bust after checking a package that had arrived from South Africa last Friday.
Inside the package were 'sample pulley wheels' which had 650g of the drug stuffed inside.
Revenue say the seizure comes as part of an ongoing operation aimed at drug smugglers.
They said: "Last Friday, Revenue officers seized approximately 650g of heroin contained in a package on arrival into Dublin Airport from South Africa.
"The illegal drugs, with an estimated street value of €70,000, were concealed in a package described as ‘sample pulley wheels’ and were destined for an address in North Dublin.
"Investigations are ongoing.
"These seizures are part of Revenue’s ongoing operations targeting drug smuggling. If businesses or members of the public have any information regarding smuggling they can contact Revenue in confidence on free phone number 1800 295 295."
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