Russia will be disqualified and sent home from Euro 2016 if its fans are responsible for any violence inside stadiums at the country's remaining games, UEFA has said.
European football's governing body on Tuesday released the results of an investigation into clashes between English and Russian fans inside the Stade Velodrome in Marseille on Saturday evening, when English fans clambered over barriers to escape Russian fans' kicks and punches.
"Charges relating to crowd disturbances, use of fireworks and racist behaviour had been brought against the RFU [Russian Football Union]," UEFA said in a statement.
Russia was also handed a €150,000 fine by UEFA's control, ethics, and disciplinary board.
The Russian Football Union has said it will not contest or appeal the ruling.
The English national team has also been threatened with the possibility of a UEFA sanction for its fans' involvement in ugly scenes of violence in Marseille. On Monday, six English fans were jailed after 20 were arrested over the weekend.
But Football Association chair Greg Dyke wrote to UEFA to argue that while "a minority" of English fans were responsible for violence in Marseille, they were not to blame for the fighting at the end of the match.
UEFA's ruling came as Russian football fans claimed that up to 50 of them are to be deported from France.
Alexander Shprygin, head of the Russian Union of Supporters, tweeted that a bus taking Russian fans to Lille was stopped and searched by riot police in Mandelieu, near Cannes in southern France, on Tuesday. He wrote that some fans were taken to the airport.
But according to Shprygin, no one on board had been involved in disorder, and one of the fans on board was 66 years old and needed medical attention.
Speaking to Reuters, Shprygin said: "They want to deport almost 50 people including women who did not take part in anything. The police are making up for their mistakes three days ago. We are in a bus in Cannes and we have been blocked in by riot police."
The Russian consulate in Marseille arrived at the scene, he said.
News agency pictures emerged on Tuesday showing French police surrounding the Russian fans' bus.
French authorities have yet to comment on the deportations.
On Monday the chief prosecutor of Marseille said that a group of 150 well-organised, "hyper-violent" Russian hooligans were behind a series of clashes in the city over the weekend. Only two Russians were arrested, however, for pitch invasion.
Patrick Smith is a senior reporter for BuzzFeed News and is based in London.
Contact Patrick Smith at email@example.com.
Got a confidential tip? Submit it here.