More than 100 people were arrested during clashes between Polish and Russian football fans ahead of the two nations' Euro 2012 match at the Polish National Stadium in Warsaw.
Polish police confirmed that the majority of arrests were made on the Poniatowski Bridge and in the Fanzone in Plac Defilad Square.
Thousands of Russian fans had marched towards the National Stadium to mark Russia Day, considered a provocative gesture by some Polish people, whose nation was subjected to decades of rule by Moscow during the Cold War.
Ten people, seven of them Polish, two Russians and one German fan, were hurt as trouble flared, but none of the injuries were life-threatening.
The clashes erupted despite an unprecedented security operation in the Polish capital.
The match itself appeared to pass without incident and ended in a 1-1 draw.