Chelsea Football Club can confirm we are investigating an incident involving a member of the crowd at last night's game against Manchester United.
The club will be examining all available footage and asks anyone who can identify the individual to contact the club.
Chelsea FC is committed to removing all forms of discrimination and if we have sufficient evidence we will take the strongest possible action, including supporting criminal prosecution."
More top news
Former Liverpool striker Djibril Cisse has been arrested as part of an investigation into a blackmail case
Shadow Chancellor John McDonnell has come under huge pressure from party MPs after he made a major economic u-turn.
Two orphaned sisters separated in South Korea have been reunited after being hired at the same hospital in Florida.