Heroin with an estimated street value of €3.2 million was seized in Co Louth today as part of a major international investigation.
Police confirmed three arrests have been made - two in the Republic and one in the north.
Gardai said the two people arrested in the Republic are aged 45 and 27 and are being held at Navan Garda Station under Section II of the Criminal Justice (Drug Trafficking) Act.
The PSNI arrested a 43-year-old man in Banbridge and he has been taken to the Serious Crime Suite at Antrim police station for questioning.
The seizure was made near the village of Collon.
It was confirmed tonight that the drugs haul was part of an ongoing intelligence-led operation involving the Garda National Drugs Unit, Dutch police and the Police Service of Northern Ireland.
Three vehicles were also seized in the operation.
PSNI Drugs Squad Detective Chief Inspector Garry Clarke said: "This is a good example of how police organisations working together can reduce the harm which drugs cause to people on the island of Ireland."