Kilmarnock have launched an investigation after a video appeared to show striker Kyle Lafferty using sectarian language.
The video, which has appeared on social media, shows Lafferty reacting when a man posing for a photo with him says “Up the Celts”.
Lafferty, 34, is alleged to have shouted "fenian bastards" in response.
The former Rangers and Hearts striker is on international duty with Northern Ireland for their UEFA Nations League fixtures against Kosovo and Greece.
A statement from his club read: “Kilmarnock Football Club are aware of a video circulating online which appears to show a member of our playing staff using language of a sectarian nature.
“The club finds all forms of discriminatory behaviour completely unacceptable. The matter will be investigated by the club.”
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