The club wrote: “Millwall Football Club is aware of an alleged individual incident of discriminatory abuse towards a Swansea City player during the second half of Tuesday evening’s Sky Bet Championship match.
“The club operates a zero-tolerance policy towards any form of discriminatory abuse.
“The club is working alongside the relevant authorities to establish the facts and is unable to comment further as tonight’s alleged incident is the subject of an ongoing police investigation, which the club fully supports.”
Swansea also addressed the situation, saying: “During the second half of this evening’s Championship fixture at Millwall, Swansea City reported an alleged incident of racist abuse aimed at Ji-sung Eom.
