The Football Association has called the fans involved in disturbances in Porto an "embarrassment" to the England team.
The Three Lions' preparations for Thursday's Nations League semi-final with Holland in Guimaraes have been overshadowed by another night of disruption in nearby Porto.
England supporters clashed with Portuguese police and were seen hurling bottles, prompting some local families watching the hosts' match against Switzerland in a fan zone to flee with their crying children.