WARSAW, Poland -- UEFA charged the Russian soccer association Saturday with "improper conduct" after fans were filmed fighting with stadium stewards after a European Championship match.
UEFA also is seeking more evidence to investigate reports of "alleged abuse directed at Czech Republic players" during Russia's 4-1 win Friday in Wroclaw.
"UEFA has opened disciplinary proceedings against the Football Union of Russia for the improper conduct of its supporters," the tournament organizer said in a statement.
Anti-racist experts appointed by UEFA to monitor matches reported Saturday that fans verbally abused Czech defender Theodor Gebre Selassie, who is black.
Gebre Selassie on Sunday downplayed the seriousness of the abuse, calling it nothing "extreme" and saying he is ready to put it behind him.
UEFA's disciplinary panel will review the case against Russia Wednesday using "security reports and available images."
The alleged improper conduct relates to "crowd disturbances, the setting off and throwing of fireworks and the display of illicit banners," UEFA said.
Four stewards at the Euro 2012 stadium in Wroclaw were hospitalized and later discharged after being attacked by Russia fans, city police said.
Online footage showing fans punching the security staff in a stadium concourse area. One steward was punched to the ground and then kicked before the fans walked away.
Earlier Saturday, UEFA released a statement calling it "a brief and isolated incident involving a small group of around 30 fans who attacked a handful of stewards."
Police and a witness who took video footage said the Russia fans became aggressive when stewards tried to capture a man who had thrown firecrackers toward the pitch.
Monitors from the Football Against Racism in Europe (FARE) fans' network reported to UEFA that Russia fans also displayed a nationalist "Russian Empire" flag.
The symbol was one "we take as evidence of far-right sensibilities," FARE executive director Piara Powar told The Associated Press.
UEFA rules make national federations responsible for the actions of team supporters.
The 16 competing countries at Euro 2012 likely would be fined by UEFA before facing possible expulsion from the competition for repeated offenses.
Four years ago, UEFA fined Croatia 20,000 Swiss francs (then $19,600) for its fans' neo-Nazi flags and chants during a Euro 2008 quarterfinals loss against Turkey in Vienna, Austria.
No arrests were made Saturday, but police said they had examined security footage and have photos of 12 of the people involved in the attack.
Police said this information was being given to Polish border guards and Russian authorities in an attempt to capture the men.
In a separate incident in central Wroclaw, four Russians were detained for questioning for allegedly beating up another Russian, who was hospitalized, another Wroclaw police spokesman, Krzysztof Zaporowski, said. The man was treated and later discharged.
The suspects were under the influence of alcohol and police would question them later, Zaporowski said.
In the Ukrainian city of Lviv, a fight broke out between about 10 supporters of Russia and Ukraine outside the football fan zone after Russia beat Czech Republic 4-1, police spokeswoman Svitlana Dobrovolska said.
About six Russia fans waving the black, yellow and white flag of the Russian empire and four supporters of the Ukrainian team dressed in the national colors of blue and yellow grappled and punched each before police intervened to stop the fight. The fans were separated, told to behave and released, Dobrovolska said.
"It was nothing serious," she said.
Tensions are high between the two ex-Soviet neighbors as Ukraine seeks to move out of the shadow of its former imperial master and forge closer times with the European Union. Disagreements range from different views on the two countries' shared history, the price of Russian gas imports, the use of the Russian language in Ukraine and even a recent quarrel over Ukrainian cheese imports to Russia.
Information from The Associated Press was used in this report.