Police seized 324 kilograms of pure cocaine and arrested three people in Thessaloniki on Friday.
According to authorities, the suspects planned to mix the cocaine with other substances and sell it in Greece.
The drugs have a street value of about €100 million.
The operation had been conducted in cooperation with the U.S. Drug Enforcement Administration’s Athens office and the the Drug Prosecution Sub-Directorate of Thessaloniki.
The three leaders of an international drug trafficking network, a 37-year-old Albanian citizen, a 36-year-old Croatian and a 35-year-old Greek citizen born in Albania, were arrested in central Thessaloniki as they met to decide how to sell the drugs.
A van containing most of the drugs (divided into 260 packages) was impounded and an apartment rented by the Croatian was searched. In addition, €5,265 and 5 mobile phones were confiscated.
A fourth member of the drug trafficking network has also been identified, who police are searching for.