Police from the drug squad in the port town of Igoumenitsa arrested three men with nearly 400 kilos of hashish in the early hours of Thursday near Filiates.
The three men, all Greek nationals, raised the suspicion of police as they were driving two cars and a semi-truck on a road near the Greek border with Albania.
Police blocked the vehicles at about 4:00 a.m. and conducted a search, which turned up 13 travel satchels in the semi-truck containing a total of 380 kilos of hashish, which were confiscated.
The three drivers, during questioning, said the narcotic was destined for Athens.
They will appear before a local prosecutor later in the day.