Stock Photo: sports, football, Bundesliga, 2011/2012, Borussia Dortmund versus SC Freiburg 4:0, Stadium Signal Iduna Park in Dortmund, football fans, rampage, riots, Bengal light, rocket flare, stewards, security force

Stock Photo: 1566-1014007 sports, football, Bundesliga, 2011/2012, Borussia Dortmund versus SC Freiburg 4:0, Stadium Signal Iduna Park in Dortmund, football fans, rampage, riots, Bengal light, rocket flare, stewards, security force