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A fire bomb explodes among riot police during clashes in Athens Wednesday Sept. 26, 2012. Police clashed with protesters hurling petrol bombs and bottles in central Athens Wednesday after an anti-government rally called as part of a general strike in Greece turned violent. (AP Photo/Dimitri Messinis)

A fire bomb explodes among riot police during clashes in Athens Wednesday Sept. 26, 2012. Police clashed with protesters hurling petrol bombs and bottles in central Athens Wednesday after an anti-government rally called as part of a general strike in Greece turned violent. (AP Photo/Dimitri Messinis)

Greek financial crisis

Greek rights groups warn of an explosion in racist violence over the past

year, with a notable surge since national elections in May and June 2012 that

saw dramatic gains by the far-right Golden Dawn party.