Members of the Gardaí and PSNI have seized over €264,000 worth of drugs in separate operations on both sides of the border.
Two men were arrested after cocaine and herbal cannabis were seized in Co Antrim on Friday.
A 32-year-old man was arrested in the Short Strand area of Belfast and a 66-year-old man was arrested at a separate address.
Detective Inspector Barry Hamilton, from the PSNI's Organised Crime Unit, said: "Today's search and arrest activity was part of an ongoing investigation into drugs criminality linked to an organised crime gang."
During a search in the Short Strand area officers recovered cocaine and herbal cannabis worth over €164,000.
Some stg£22,000 (€25,823) in cash was also seized.
At a second address, officers seized €1,000 in cash and a number of mobiles were seized from an address in Lisburn.
Meanwhile, Gardaí investigating the sale and supply of drugs in the Roscommon area have seized €100,000 of suspected cannabis.
The discovery was also made on Friday.
No arrests have been made and investigations are ongoing.