New footage has emerged appearing to show England fans in Lyon being attacked by a gang thought to be so-called "ultras".
Fans were drinking in a bar when a group of around 30 masked men burst in.
Objects including tables can be seen being thrown and there are scuffles as the hooded group leave the scene.
Police were later pictured at the scene of the disorder. No one was injured during the incident.
The footage was recorded in Lyon, around an hour's drive from Saint Etienne, where England's final group match against Slovakia takes place on Monday evening.
The worst of the violence during the competition took place in Marseille ahead of and after England's opening match against Russia, when there were clashes inside and outside the stadium.
The disruption has led to several fans being jailed and both sides being threatened with expulsion from the tournament if there are repeat incidents.
In Toulouse, where Wales face Russia on Monday, more than 600 extra police officers will take to the streets, on top of the 1,500 already due to work, after the match was upgraded to high risk. There will be a midnight curfew in the city and a ban on glass bottles.
The incident highlights a growing problem at Euro 2016 with ultra groups including Russians, Hungarians and French.
England fans in Marseille were targeted by Russians ahead of their first game. The city also saw a large gathering of Hungarian ultras ahead of the Hungary Iceland game at the weekend.
British police officers working with French counterparts are urging them to be aware of the threat from such groups after two England fans were left in comas in Marseille.
Ultras are named as such because of their fanatical team support which is organised and choreographed and can spill into pre-planned violence.