Everton have said they are working with Merseyside Police to investigate a reported incident of racist abuse directed towards an Arsenal player.
It took place 15 minutes into Everton's 1-0 defeat to the Gunners at Goodison Park on Sunday.
"Racism has no place in our stadium or our communities," the club said in a statement.
Everton said the reported incident happened in the Lower Gwladys Street Stand near to the Bullens Road Stand.
"Everton condemn all forms of discrimination and we will seek the strongest possible sanctions to tackle anti-social and/or criminal behaviour, including club bans and criminal prosecution," the club's statement added.