England manager Roy Hodgson and captain Wayne Rooney have urged to fans to avoid confrontation ahead of their crucial Euro 2016 Group B game against Wales.
In a video posted on the Football Association's official Twitter page, Hodgson and Rooney highlighted that further incidents of violence could lead to a premature end to their tournament.
"As the England manager, I am obviously now very concerned about the threat that is hanging over us and the sanction that could possibly be imposed upon the England team," Hodgson said.
"I'm appealing, therefore, to all of our fans, and we appreciated your support at the matches, of course, but I'm appealing to you to stay out of trouble to try and make certain these threats are never carried out and we will be able to do the best we can to stay in the competition."
Violence by the English and Russian inside Marseille's Stade Velodrome stadium, following the cdonclusion of Saturday's match has marred the tournament, with UEFA having warned English and Russian officials that their teams will be sent home if the trouble continues.
Rooney echoed his managers' sentiments urging fans to avoid travelling to the match against Wales unless they have tickets.
"I'd like to ask the fans: Please, if you don't have a ticket, don't travel. And for fans with tickets: Be safe, be sensible and continue with your great support for the players," the Three Lions skipper added.