Burnley have condemned "tragedy chanting" that took place during their 1-1 draw against Manchester United at Old Trafford.
The Clarets, who are second-bottom in the Premier League, scored a late equaliser on Saturday to grab a vital point.
But following the match the club issued a statement after "offensive footage" was posted online showing offensive "gesturing and chanting" in the away end.
"We are aware of offensive footage currently circulating on social media from the away end of today’s fixture at Old Trafford," the club said.
"Tragedy related gesturing and chanting is completely unacceptable, and Burnley Football Club take a zero-tolerance approach.