Army rangers boarded a Panamian registered bulk cargo vessel and seized the drugs on Tuesday.
Five men remain in custody this morning over a massive 157 million euro drugs haul off the Cork coast.
They're being questioned in the south of the country.
Another man was released without charge yesterday afternoon.
Army rangers boarded the Panamian registered bulk cargo vessel, the MV Matthew on Tuesday when the drugs were seized.
Irish Independent Southern Correspondent, Ralph Riegel says the drugs are being analysed in Dublin: