Euro 2016: 'There's more police than fans'
First Minister Carwyn Jones has written to the French ambassador to the UK to emphasise France's duty to protect Wales supporters at Euro 2016.
The FA has raised "serious concerns" about security in Lille, where fans are due ahead of Thursday's match between England and Wales in nearby Lens.
Russia fans, involved in violence in Marseille, will also be in Lille to as their team plays Slovakia on Wednesday.
More police are being sent from Britain to help stop trouble.
Supporters who are already in Lille have said they are worried about potential trouble in the city ahead of Thursday's England and Wales clash.
Ashton Allen, 22, originally from Cardiff, travelled from London on Tuesday and said there was a large police presence at the railway station in Lille.