Arsonists fire-bombed three foreign car dealerships in Athens in the early hours of Wednesday, causing extensive damage but no injuries, reported the DPA.
The foreign dealerships, among them Opel and Nissan, are located in different parts of the Greek capital, and police said two of the attacks took place simultaneously.
The extent of the damage was not immediately clear, and police were investigating.
Vehicles belonging to diplomats, businessmen and politicians have often been attacked by anarchists in Greece.