Greek protesters and riot police have clashed in central Athens after anti-US rallies turned violent.
Petrol bombs were met with tear gas as rioters tried to break through police cordons to reach parliament buildings.
About 7,000 people, among then anti-war, anti-racism leftist groups, trade unionists and communist party supporters all expressed their anger at Washington.
“We consider American policy as murderous to the people. They are responsible for the outcome of the Arab Spring, for the wars since then, for the intervention in Syria. They only care for oil and don’t care about the people,” said one demonstrator.