Kilmarnock is investigating striker Kyle Lafferty’s alleged use of sectarian language.
A video circulating online shows the 35-year-old posing with a fan before allegedly making a sectarian comment.
Kilmarnock has now confirmed they are investigating the incident.
In a statement, Rugby Park club said: “Kilmarnock Football Club is aware of a viral video online that appears to show a member of our team using racist language. faction.
“The club finds all forms of discriminatory behavior completely unacceptable. The incident will be investigated by the club.”
Lafferty is on international duty with Northern Ireland, who face Kosovo on Saturday in the Nations League.