Over 100 arrests were made as Polish and Russian football fans clashed in Warsaw ahead of the two nations' Euro 2012 Group A clash at the National Stadium, which ended in a 1-1 draw.
Incidents on the Poniatowski Bridge in the capital, and in the Fanzone in Plac Defilad Square, were reported to have accounted for the majority of the arrests, with Polish police indicating the numbers were likely to continue to rise.
In a statement, the force also confirmed 10 people were injured - seven Polish, two Russians and one German - but cited medical agencies in claiming none of the injuries were believed to be life-threatening.
Trouble flared despite an unprecedented security operation in the Polish capital, and although the game appeared to pass largely without incident, there were fears of further trouble as fans began to depart from the stadium.
A Warsaw police spokesperson said: "We are still monitoring the situation and trying to identify the supporters involved. The operation is not over from our side as we continue in our attempts to catch those who are causing trouble."
Thousands of Russian fans had marched towards the National Stadium to mark Russia Day, considered a provocative gesture by some Poles whose nation was subjected to decades of rule by Moscow during the Cold War.
The trouble is the latest blight on the co-hosted tournament, with UEFA already indicating they will launch investigations into allegations of racist chanting in games involving Spain and Italy, and Russia and the Czech Republic.
Prior to the tournament, some Dutch squad members complained of hearing racist abuse during a training session at Wisla Krakow's stadium.