Songs about the 2000 event in which two Leeds supporters were fatally stabbed by Galatasaray supporters and the 1958 Munich air catastrophe, which claimed the lives of 23 people, was heard during their Premier League match.
After a Premier League match was rescheduled, the bitter rivals were forced to face off again in four days, with their Wednesday match ending in a 2-2 draw after Leeds had grabbed an unexpected 2-0 lead.
“Both clubs strongly condemn chanting from both sets of fans regarding historic tragedies at today’s game,” a joint-statement from both clubs read.
“Such behaviour is completely unacceptable and we will continue to work together with our respective fan groups and the Premier League and other authorities on eradicating it from football.”
This time, United’s goals from Marcus Rashford and Alejandro Garnacho secured all three points, extending Leeds’ dismal run of Premier League performance.
The Whites have gone nine Premier League games without a victory, and Jesse Marsch was fired on Monday, leaving them without a manager.