Kilmarnock Football Club are investigating after a video was posted online appearing to show forward Kyle Lafferty use sectarian language during a confrontation with a Celtic fan.
The 35-year-old former Rangers and Hearts player can be seen stopping for a picture with a man in a bar or club who then shouts “up the Celts”.
As the man then walks away, Lafferty appears to shout a sectarian slur after him.
Kilmarnock have now confirmed that they are aware of the video and are investigation as they reiterate the club’s stance against discriminatory behaviour.
The statement released on the Rugby Park club’s website on Thursday said: “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.”
Lafferty is currently on international duty with Northern Ireland for their games against Kosovo and Greece.
As well as large chunks of his career spent in Scotland he has also played in Italy, Norway, Turkey and a host of English clubs including Sunderland and Burnley.
He signed a one-year contract extension at Rugby Park in May.