NEW : UEFA president Michel Platini urges fans to behave at decisive matches Saturday . UEFA said it was acting over `` the setting-off and throwing of fireworks , and the improper conduct of supporters , '' including racist chants and the displaying of racist symbols . UEFA says there were racist chants from Croatian fans during a match against Italy . The issue of racism threatens to disrupt the Euro 2012 soccer tournament . A disciplinary panel will investigate the cause against UEFA on Tuesday .
NEW : UEFA president Michel Platini urges fans to behave at decisive matches Saturday . UEFA says there were racist chants from Croatian fans during a match against Italy . The issue of racism threatens to disrupt the Euro 2012 soccer tournament . A disciplinary panel will investigate the cause against UEFA on Tuesday .