May Day protests around the world

Athens, Greece: A policeman detains a demonstrator Photograph: Angelos Tzortzinis/AFP/Getty Images Photograph: Angelos Tzortzinis/guardian.co.uk Athens, Greece: A riot policeman runs away from a fire caused by a molotov cocktail Photograph: Dimitar Dilkoff/AFP/Getty Images Photograph: Dimitar Dilkoff/guardian.co.uk Athens, Greece: Demonstrators clash with police Photograph: Louisa Gouliamaki/AFP/Getty Images Photograph: Louisa Gouliamaki/guardian.co.uk Berlin, Germany: Riot police gather in readiness for possible clashes with left-wing demonstrators Photograph: Gero Breloer/AP Photograph: Gero Breloer/guardian.co.uk Berlin, Germany: Riot police take up positions during May Day protests Photograph: Jens Meyer/AP Photograph: Jens Meyer/guardian.co.uk Berlin, Germany: Riot police survey the aftermath of the May Day protests Photograph: Gero Breloer/AP Photograph: Gero Breloer/guardian.co.uk Hamburg, Germany: Large stones lie in a street following May Day protests Photograph: Marcus Brandt/EPA Photograph: Marcus Brandt/guardian.co.uk Hamburg, Germany: Protesters build a barricade during May Day clashes Photograph: Christian Charisius/Reuters Photograph: Christian Charisius/guardian.co.uk London, UK: An effigy of Gordon Brown is left outside Labour party headquarters during May Day protests Photograph: Andy Rain/EPA Photograph: Andy Rain/guardian.co.uk Bogotá, Colombia: Riot police use a water cannon to disperse demonstrators Photograph: Rodrigo Arangua/AFP/Getty Images Photograph: Rodrigo Arangua/guardian.co.uk Cali, Colombia: A demonstrator smashes the glass door of a bank's offices Photograph: Luis Robayo/AFP/Getty Images Photograph: Luis Robayo/guardian.co.uk Santiago, Chile: A demonstrator is arrested by riot police Photograph: Claudio Santana/AFP/Getty Images Photograph: Claudio Santana/guardian.co.uk Santiago, Chile: A demonstrator is restrained by riot police Photograph: Claudio Santana/AFP/Getty Images Photograph: Claudio Santana/guardian.co.uk