Castleford are investigating an alleged incident involving half-back Rangi Chase during Thursday's Challenge Cup tie between Featherstone and Halifax.
The Betfred Super League leaders issued a brief statement following reports the 31-year-old former England international was involved in an incident during the game at neighbours Featherstone.
Chase was thought to be one of two men ejected after an altercation in a bar at the LD Nutrition Stadium.
"Castleford Tigers are aware of an incident that occurred last night in Featherstone," the club said in a statement posed on their official website.
"The club is investigating the incident and will make no further comment at this time."
The former Super League Man of Steel, now in his second spell with the Tigers, was the subject of disciplinary action by his club in February when he was dropped from the team.
Chase has been named in coach Daryl Powell's 19-man squad for Saturday's Challenge Cup sixth-round tie with St Helens, although he faces a fitness test after picking up a neck injury in last Thursday's league win at Huddersfield.