Two foreign nationals were arrested in the western port city of Patras on Monday charged with drug dealing.
Acting on a tip-off, police located a 25-year old man from Afghanistan, with 80 grams of heroin in his possession.
According to police the man had purchased the heroin from an 18-year-old man, also from Afghanistan, who was also arrested a short while later.
Police are continuing their investigation into whether the two detainees belong to a drug trafficking ring.