NEW : 11 people are injured in clashes in Warsaw , Poland 's Interior Ministry says . NEW : 123 people from both sides have been arrested . Violence preceded and followed a Euro 2012 soccer game between Russia and Poland . Some 6,000 police were on duty Tuesday in Warsaw . Russian fans marched through the stadium ahead of the game to celebrate a national victory .
NEW : 11 people are injured in clashes in Warsaw , Poland 's Interior Ministry says . NEW : 123 people from both sides have been arrested . Violence preceded and followed a Euro 2012 soccer game between Russia and Poland . Russian fans marched through the stadium ahead of the game to celebrate a national victory .