Chelsea have condemned alleged "abusive language of a sectarian nature" directed at Aston Villa midfielder John McGinn at Stamford Bridge and said they will take the "strongest possible action" against the person involved.
The Blues have launched an investigation into the matter, which occurred during the Blues' 3-0 win on Saturday, and appealed for help in identifying the alleged culprit.
The west London club said from a video circulated on social media a person could be heard using abusive language towards Scotland international McGinn as he was taking a corner in front of Blues fans
"We are aware of a video circulating on social media showing an individual using abusive language of a sectarian nature in the crowd at Stamford Bridge on Saturday," a Chelsea statement read.
"Chelsea Football Club finds all forms of discriminatory behaviour totally unacceptable and we condemn the language used.
"The club is working to identify the person involved and will take the strongest possible action against them.
"Any supporter who was present in that area of the ground and has information that can assist the club's investigation should contact the club via our discrimination reporting line."
Villa thanked Chelsea for "their swift and decisive action in both condemning the bigotry aimed at John McGinn at Stamford Bridge and in launching an investigation to identify the culprit."
"Aston Villa will fully support that investigation. Both clubs have zero tolerance for the scourge of discrimination in any form when it occurs in our stadia," the midlands club said in a statement.
Australian Associated Press