Sheffield United are investigating after a video emerged on social media appearing to show striker Oli McBurnie in an altercation with a group of young men.
A club statement said: “Officials at Sheffield United are aware of the video circulating on social media.
“We are currently investigating.”
Scotland international McBurnie, 24, was ruled out for the rest of the season after fracturing his foot in the Blades’ 3-0 Premier League defeat by Arsenal in April.
Sheffield United have won just five Premier League games this season and have been relegated to the Championship.