Three people have been held in separate drug hauls at Dublin Airport and also in Termonfeckin, Co Louth.
Two men were arrested after gardaí seized cannabis herb with an estimated street value of €1.3m.
The men, aged 40 and aged 59, are being held at Drogheda Garda Station.
Separately in an unconnected incident at Dublin Airport, a woman in her 30s, originally from Spain, was arrested after cocaine with an estimated street value of €140,000 was seized.
The woman is being held at Clondalkin Garda Station.