Fans without valid tickets caused the crowd problems in Paris.
The chaos at the stadium was caused by a mass gathering of supporters with fake tickets.
She said that local youths trying to force their way in made things worse.
UK Culture Secretary Nadine Dorries described the French police response to the scenes as deeply concerning.
French police fired pepper spray and tear gas at a group of fans waiting to get into the stadium.
Ahead of a meeting with the French sports ministry, Uefa, the French Football Association, stadium officials and police on Monday to draw lessons from the event, the latest comments come.
The mass gathering of the British supporters of the club, without tickets, or with fake tickets, was the first thing that happened, according to Ms Oudea-Castera.
She said that more people from the local area tried to force their way in through the doors.
A group of youths from the nearby area tried to get in by mingling with the crowd.
She expressed regret that families and children were impacted by the use of tear gas.
The start of the match was delayed by more than half an hour because of the late arrival of fans.
The vast majority of the fans at the game arrived early and behaved in a professional manner, according to the police.
Fans were waiting in long lines hours before the match started.
Ms Oudea-Castera said the meeting of officials was to identify what went wrong to avoid a repeat of the scene in the future. The Rugby World Cup and the Olympics will be hosted in Paris.
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