Greek riot police have clashed with demonstrators trying to march to the US embassy in Athens to protest against visiting US Secretary of State Condoleezza Rice.
Ms Rice is on a five-day visit to Europe
Police in riot gear clashed with protesters trying to break through their cordon, and police used teargas while the protesters threw sticks, stones and petrol bombs.
Ms Rice is meeting Greek Prime Minister Costas Karamanlis and her Greek counterpart Dora Bakoyanni as part of a five-day trip to Europe that also includes visits to Turkey and Bulgaria.
Thousands of protesters, waving banners reading "Rice Go Home", gathered in central Athens vowing to reach the heavily guarded embassy, but most retreated under the teargas.
A small group of self-styled anarchists trailing the march continued clashing with police, burning cars and smashing shop windows. There were no reports of injuries or arrests.
Greek activists usually protest against visits by senior US officials. Former Secretary of State Colin Powell cancelled a visit to the Athens 2004 Olympics for fear of violent protests.