Five men remain in Garda custody this morning in connection with two separate heroin seizures in Dublin.
Three are being questioned in connection with a two million euro heroin seizure in Tallaght on Friday night.
Cannabis and cocaine were also recovered during the planned operation.
A fourth man being held in connection with the seizure was released overnight.
Another two men, aged 22 and 32, were arrested at Harelawn Park in Clondalkin last night after heroin worth more than 60 thousand euro was seized by Gardai.
They are being detained at Ronanstown Garda station.