Everton are "seeking answers" to what they claim was the "disproportionate police response" to trouble in Lille before their recent Europa League tie, reports BBC News. Police used a stun grenade and rubber bullets during clashes last Thursday.
A French police spokesman maintained his officers acted in self-defence against "rioters", but fans said they were "heavy-handed" and used tear gas.
Everton's head of security Dave Lewis alleged police "caused unnecessary fear and avoidable injuries to bystanders".
He said the club was working with both Merseyside Police and Liverpool Mayor Joe Anderson to try to establish what happened in the northern French city.
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