Hibernian have condemned “the racist comment made towards Allan Delferriere on social media” after Tuesday’s 2-2 draw with Ross County.
Substitute Delferriere, 21, scored an own goal as County reduced their deficit to 2-1 and Jordan White soon brought the visitors level.
The Belgian has made nine appearances since joining Hibs last year.
“The club condemns this abhorrent action in the strongest possible way,” Hibs said in a statement.
“Racism and any kind of discrimination have no place at Hibernian FC, in football or society as a whole.
“The club will investigate the post alongside the social media platforms in question and if identified, the individuals in question will face the strongest possible action.
“Allan has the full support of everyone at Hibernian FC. There is no room for racism.”
