A group of Man United fans brought along an 'Istanbul' banner to wave at Leeds fans during their Carling Cup tie last night.
The taunt was in reference to the murders of Leeds fans Christopher Loftus and Kevin Speight, who were stabbed to death in Turkey in 2000.
Tension between the rival sides was at a high last night, as the home supporters were also caught mocking the Munich air disaster.
Watch footage of the 'Istanbul' incident below: