A Greek prosecutor on Sunday (Europe time) charged seven people for fraudulently selling large quantities of adulterated sunflower oil as olive oil in Greece and abroad.
The seven, a family of four and three of their relatives, were arrested by police and they are also charged with forming a criminal gang, defrauding the state, falsifying documents and money laundering.
They will face an examining magistrate later in the week, the prosecutor's office said.
The seven were arrested near the city of Larissa, in the Greek province of Thessaly, about 150km south of the northern Greek city of Thessaloniki, by the financial crimes squad of northern Greek police.
They were found operating a workshop where they added a dye to turn the yellow sunflower seed oil into a green hue resembling olive oil.