Everton’s clash with Lyon was sent into chaos after Ashley Williams and the Lyon keeper came together.
The tussle spilled off the pitch and fans became involved.
One fan was seen trying to throw a punch while holding a child.
And Everton have moved to ban the spectator who struck the Lyon goalkeeper.
“Club Officials have reviewed the footage of an incident that occurred in the 64th minute of the game against Olympique Lyonnais where supporters towards the front of the lower Gwladys Street End became involved in a confrontation between players,” a club statement said.
“We have identified one individual whom action will now be taken against. This will include a ban from attending future Everton fixtures and the Club registering a formal complaint with Merseyside Police.”
The Merseyside Police made an appeal for anyone with information “which could assist the investigation” and asked them to contact the force on 0151 777 4065 or Crimestoppers anonymously on 0800 555 111.
Both clubs are also expected to be subject to disciplinary proceedings from European governing body UEFA following the melee, which began after Wales defender Williams had clashed with the Lyon goalkeeper.
Players from both sides became embroiled in the fracas, which moved to the advertising hoardings, where one Toffees fan, holding a child, appeared to push Lopes in the head before hitting out at him again.
While that was occurring, Williams seemed to raise his hand to Lucas Tousart’s face. However, he avoided dismissal with both the Everton captain and Lyon’s match-winner Bertrand Traore booked.
Speaking after the Toffees’ 2-1 loss, Williams told BT Sport 2 of the scuffle: “It’s what happens, it’s football. It is what it is.
“It’s high emotions. We want to win the game, they want to win the game and stuff happens. That was just one of those times.”
It was, however, referee Bas Nijhuis who under-fire Toffees manager Ronald Koeman blamed for his players losing their cool during a defeat which leaves them facing Europa League elimination having taken just one point from three games.
“I think the irritation grows in the game for our players and in my opinion that was the problem by the referee,” Koeman argued.
“The referee was Dutch but he didn’t do anything against the theatre of some of the Lyon players. (Nabil) Fekir in the first half dived 10 times.
“I understand with my players, that comes out of frustration.”
It compounded another miserable night for Everton and Koeman, who is under mounting pressure with his team having won just two of their previous dozen fixtures.
“I think the performance was under the level in the first half – a lot of mistakes, a lot of doubts, players without any confidence,” the Dutch coach said.
