The chief prosecutor in the French city of Marseille says Russians involved in clashes with British fans at a Euro 2016 soccer championship match were "extremely well-trained" and prepared for violence.

Brice Robin said on June 13 that "there were 150 Russian supporters who in reality were hooligans" who were ready for "ultrafast, ultraviolent action."

Fights between the rival fans before and after the England-Russia game in Marseille on June 11 resulted in 35 people being injured, with at least one British fan in critical condition.

British Assistant Chief Constable Mark Roberts said many Russian hooligans were wearing martial arts gloves and carrying knives.

Robin said 10 soccer fans -- including six Britons -- will go to court to face charges for "violence with arms" on June 12.

He added that two Russians are also being expelled from France.

UEFA has warned both the English and Russian soccer federations that their respective teams face expulsion from Euro 2016 if their fans continue to misbehave.

UEFA is due to rule on a punishment for the Russian federation on June 14.

Russian Sports Minister Vitaly Mutko said his country's fans "behaved improperly" and predicted UEFA would impose a fine this week.

Russia scored a late goal in the game to earn a 1-1 draw with England.

Based on reporting by Reuters, AP, and AFP