These pictures show the confrontation between police and anti-austerity protesters in Frankfurt, Germany.
Three police cars were set alight and two officers injured as demonstrators trying to blockade the inauguration ceremony for the European Central Bank’s new headquarters.
Several thousand riot officers pursued what they said was a minority of violent activists as the bulk of protesters conducted themselves peacefully ahead of a rally in the city’s main square. Some blocked bridges across the Main River and streets.
The Blockupy alliance says activists plan to blockade the new headquarters and disrupt what they term capitalist business as usual.
IN PICTURES: Police and protesters clash in Germany