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Soccer hooligans clashed with rival fans and police before and during Poland's Euro 2012 clash against bitter rival Russia in Warsaw on Tuesday night.
15 people were injured and more than 100 detained.
The game ended in a one-all draw as both teams kept their quarter-final aspirations alive.
With the Czech Republic having beaten Greece 2-1 earlier in the day, Russia top Group A on four points after two matches with the Czechs second on three points.
Poland are third on two and Greece fourth on one.
