A man in an England shirt appeared to be led away by security guards at a World Cup fanzone in Swansea after tensions boiled over and there were reports of pints being thrown and injuries.
Wales bowed out of their first World Cup in 64 years as they finished a disappointing group stage with a 3-0 loss to neighbours England that put them in last place.
They lost talisman Gareth Bale at halftime with a hamstring injury and England proved too strong with in-form Marcus Rashford grabbing two goals and Phil Foden getting the other.