Clashes between police and protesters continued overnight in Athens as it marked the first anniversary of the fatal police shooting of a teenager. Riot police fired volleys of tear gas and fought running street battles with demonstrators who pelted them with rocks and set fire to rubbish bins.However, the protests have been nothing like the riot scenes of last year, a BBC correspondent says.
Six thousand police have been deployed on the streets of the Greek capital.
At one point about 200 masked demonstrators were holed up in Athens's neoclassical university building, smashing marble chunks off the steps to use as missiles against police. City officials said the university dean suffered head injuries when youths raided the building and was rushed to hospital.
Police officers corralled demonstrators into restricted areas and denied them the chance to run amok. Snatch squads on motorbikes roamed the streets and carried out a number of arrests. Some officers were pulled from their machines, and there were reports of bike riding policemen lashing out at people with their truncheons.