England fans came under attack inside the stadium following the country's 1-1 draw with Russia after another day of violence on the streets of Marseille.
Reports from the Stade Velodrome in Marseille said Russian supporters went into England fans' areas of the ground after the final whistle.
The Russian fans grabbed flags and threw projectiles, forcing panicked England fans to clamber over barriers as stewards looked on.
Ugly clashes at the end of #ENG 1 #RUS 1 pic.twitter.com/YCVox0Veij
— Simon Peach (@SimonPeach) June 11, 2016
The incident came after a third day of violence in the Mediterranean port city left as many as 20 England fans injured, with two England fans were reportedly in a critical condition in hospital.
French police used water cannon and tear gas on rioters after fist-fights and bottle throwing broke out between the England supporters and their Russian and French counterparts in Marseille's Old Port on Saturday afternoon.
French paper L'Equipe reported that two England fans were in a critical condition after the running battles in the square and on side streets on Saturday afternoon, with a further 11 receiving minor injuries.
Video of Marseille right now at the Vieux Port. Fans clashing with police ahead of the #ENG #RUS game#EURO2016 pic.twitter.com/F3bJzukqfv
— Onefootball (@Onefootball) June 11, 2016
Some of the streets close to the port were left covered in streams of blood and broken glass.
Eyewitnesses said a group of Russian hooligans arrived before fighting began.
Chairs from outside bars and cafes had been smashed apart and used as weapons. Some were covered in blood.
Car windscreens had also been smashed during the fighting and onlookers said the area looked "like a war zone".
🤔 RT @RAMCMXCV: Police absolutely nowhere to be seen. Been going on for about 15 minutes. #Marseille #Euro2016 pic.twitter.com/tCcG5hCXbC
— Arsène's Son (@hughwizzy) June 11, 2016
Hundreds of people were contained within the area by a long line of riot police police who had formed a line, while some people were chanting "England" or "Russia".
Tournament organiser UEFA issued a statement condemning the violence but said it could only take disciplinary action "for incidents which happen within the stadium perimeter".
It added: "People engaging in such violent acts have no place in football."
A British Foreign Office spokeswoman said: "We are in contact with French authorities about a British national injured in Marseille and stand ready to provide further support."
