Russia could face disciplinary action over the behaviour of their fans during their European Championship victory over Czech Republic, which was marred by allegations of racism and violence.
Press Association Sport understands UEFA are considering whether to take action against the Russian Football Federation after anti-racism campaigners claimed Czech defender Theodor Gebre Selassie was the victim of monkey chants during Friday night's Group A game in Wroclaw.
And European football's governing body were also deciding if they would sanction Russia after their fans were caught on camera attacking stewards in a walkway at the Municipal Stadium.
Euro 2012 is only two days old but it is already in danger of being spoilt by fan behaviour, with two incidents of alleged monkey chants at stadia inside 48 hours, and numerous reports of violence across Poland and Ukraine.
The FARE (Football Against Racism in Europe) network has confirmed one of their observers at the Russia-Czech Republic game heard "fleeting" racist abuse of Gebre Selassie.
Asked if it included monkey chants, FARE chief executive Piara Powar told Press Association Sport: "Our observer reported descriptions of that nature. It was directed at the Czech Republic's only black player."
Powar said the abuse came from a "small section of the crowd" and admitted: "It may not be easy to pull together evidence for a case to be brought."
UEFA asked FARE to help appoint expert spotters to report offensive banners, chants and behaviour in stadiums.
Powar also confirmed "Russian Empire" flags were displayed during the game, which Russia won 4-1.
The Czech Republic camp were not immediately available for comment but it is understood they had not yet made a formal complaint over the alleged abuse of Gebre Selassie.