A number of Manchester City supporters have been caught on film singing chants about the Munich air disaster, which resulted in the death of eight Manchester United players back in 1958.
Twenty-three people in total were killed when a plane crashed after failing to take off due to icy conditions on a runway in Germany.
After United sealed a 4-2 victory over their local rivals at Old Trafford on Sunday, a number of City fans stayed behind outside the ground and chanted numerous vile lyrics about those who died.
Last weekend's result has put United third in the Premier League table, four points above fourth-placed City.
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