Millwall says any fans found guilty of racist chanting will be banned for life – as both the club and the FA investigate pre-match violence which left a man with a slash wound to the face.
The club said they were aware of and “extremely disappointed by” a video circulating online showing alleged racist chanting.
Anti-discrimination group Kick It Out called for “swift, firm and decisive action against the perpetrators”.
The FA said it was aware of the incident and was investigating.
In addition, a man in his 20s suffered a slash wound to the face during an apparent fight between Millwall and Everton fans prior to the fourth round clash in the FA Cup, which Millwall won 3-2.
Video on social media shows officers trying to separate two large groups in the Hawkstone Road area of southeast London as punches were thrown.
The victim was taken to hospital with non-life-threatening injuries. There have been no arrests so far.
“Millwall Football Club is aware of, and extremely disappointed by, a video circulating online displaying alleged racist chanting during Saturday’s victory over Everton,” the club said.
“The club will, as is commonplace following such incidents, work with all relevant authorities during investigations into the matter and look to identify individuals involved.
“Anyone identified and guilty of such abuse will be banned from The Den for life.”
Everton has encouraged fans to share any useful information, saying it was supporting “ongoing investigations into unacceptable organised disorder and other fan safety-related matters”.
Kick it out said that “(alleged) racist chanting heard from some Millwall supporters during yesterday’s match is disgusting and typical of mass discriminatory chants that continue to go unpunished”.
Speaking on Saturday after the man had been slashed across the face, Detective Inspector Darren Young said: “The behaviour of those involved in this incident is nothing short of disgraceful and those involved can be certain we will be working to identify them.
“We are aware of the video circulating online, which has quite rightly elicited shock and disgust. We are looking at it and urge anyone with information that could assist police to call 101 referring CAD 5117/26 Jan.”
(c) Sky News 2019: Millwall investigate racist chant video after fan violence