FA boss Greg Dyke slams Uefa and admits having 'serious concerns' over Euro 2016 safety
FA chairman Greg Dyke has warned Uefa he has "serious concerns" about security at Euro 2016 in the coming days.
England's first game against Russia was marred by violence on the streets of Marseille and inside the Stade Velodrome.
Uefa threatened England and Russia with expulsion from the tournament following the ugly scenes.
In a strongly-worded letter to European football's governing body, Dyke slammed Uefa for suggesting English fans were partly responsible for the violence.
"This is contradicted both by the video evidence and by the fact your independent disciplinary bodies have instigated sanctions only against the Russian football union," he wrote.
Dyke said stewarding arrangements were "unacceptable" and argued there was "insufficient segregation" between the Russian and English fans,
He said the FA had advised supporters without tickets not to travel to Lens for England's next game against Wales on Thursday.
"Whilst we will be working hard to positively influence their behaviour we have serious concerns around the security arrangements for the city in the next few days," he said.
He urged French authorities to ensure police had a coordinated plan to avoid a repeat of the scenes in Marseille.
England manager Roy Hodgson and captain Wayne Rooney earlier appealed to English fans to behave.