Greek protesters demonstrate against austerity measures

Riot police on duty in the port of Piraeus. All Greek-flagged ships remained in port in protest against austerity measures Photograph: Orestis Panagiotou/EPA Photograph: Orestis Panagiotou/guardian.co.uk Communist-affiliated strikers sit by the Island Chios ferry to prevent it from leaving Piraeus Photograph: Louisa Gouliamaki/AFP/Getty Images Photograph: Louisa Gouliamaki/guardian.co.uk Tourists walk past ships in Piraeus during the strike Photograph: Yannis Behrakis/Reuters Photograph: Yannis Behrakis/guardian.co.uk Strikers march through the port of Piraeus to prevent ferries from leaving Photograph: Louisa Gouliamaki/AFP/Getty Images Photograph: Louisa Gouliamaki/guardian.co.uk Riot police blockade the entrance to the Greek parliament in Athens Photograph: Simela Pantzartzi/EPA Photograph: Simela Pantzartzi/guardian.co.uk Protesters try to reach the parliament building in the centre of Athens Photograph: Louisa Gouliamaki/AFP/Getty Images Photograph: Louisa Gouliamaki/guardian.co.uk Protesters clash with riot police in front of the parliament building Photograph: Louisa Gouliamaki/AFP/Getty Images Photograph: Louisa Gouliamaki/guardian.co.uk A protester raises his hand as he stands in front of police guarding the Greek parliament Photograph: Yannis Behrakis/Reuters Photograph: Yannis Behrakis/guardian.co.uk A protester shouts slogans in front of the parliament building Photograph: Louisa Gouliamaki/AFP/Getty Images Photograph: Louisa Gouliamaki/guardian.co.uk Protesters beat a riot policeman during a demonstration against austerity measures in Athens Photograph: John Kolesidis/Reuters Photograph: John Kolesidis/guardian.co.uk A demonstrator uses a slingshot during a clash with riot police Photograph: Orestis Panagiotou/EPA Photograph: Orestis Panagiotou/guardian.co.uk Smoke billows as demonstrators clash with police in Athens Photograph: Louisa Gouliamaki/AFP/Getty Images Photograph: Louisa Gouliamaki/guardian.co.uk A protester clashes with police in front of the parliament building Photograph: Louisa Gouliamaki/AFP/Getty Images Photograph: Louisa Gouliamaki/guardian.co.uk A riot police officer helps an injured colleague in Athens Photograph: Angelos Tzortzinis/AFP/Getty Images Photograph: Angelos Tzortzinis/guardian.co.uk A protester attacks policemen with a wooden pole. Over 10,000 people attended the Athens demonstration Photograph: Yannis Behrakis/Reuters Photograph: Yannis Behrakis/guardian.co.uk A demonstrator is arrested by police Photograph: Angelos Tzortzinis/AFP/Getty Images Photograph: Angelos Tzortzinis/guardian.co.uk A riot policeman pushes away a protester who was trying to stop officers detaining a suspected rioter in Athens Photograph: Petros Giannakouris/AP Photograph: Petros Giannakouris/guardian.co.uk