At least two people have been injured during clashes between police and protesters at a rally in Athens. The march was to commemorate the death of a student shot by police in 2008.
After a peaceful start the demonstration descended into violent clashes as the marchers reached the parliament building.
Police fired tear gas at hooded youths who pelted them with stones and bottles. There were clashes in other parts of the capital as well as in the northern city of Thessaloniki.
Turn out at the protest was reportedly smaller than in recent years but the pattern of violence was similar.
Demonstrators used the march to once more vent their fury at austerity measures being imposed by the Greek government as a result of the debt crisis.
Protesters shouted slogans against the measures and called for social revolution as they marched towards the parliament.