A fan at the FA Cup Final was arrested for wearing a shirt mocking the Hillsborough disaster which saw 97 Liverpool fans lose their lives following a fatal crush in a stadium in 1989.
The Manchester United fan was snapped wearing the shirt at Wembley in the game against bitter rivals Manchester City.
The personalised United away shirt showed the number 97, an alleged reference to Hillsborough, accompanied by the words 'Not Enough'.
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A social media user shared the image, which has sparked both outrage and disgust online following the conclusion of the game.
Metropolitan Police said: "We are aware of this and have worked proactively with officials at Wembley to identify the individual, The Mirror reports.
"He has been arrested on suspicion of public order offence and taken into custody."
Hillsborough Survivors Support Alliance (HSA) wrote: "Anyone who thinks this is acceptable behaviour needs to come and speak to us and the families of the 97."
Other supporters were disgusted by the shirt, with one saying: "How was that even allowed [to] be printed in the shop".
Another added: "Not brave enough to show his face though".
Another said: "I understand we're rivals but if I ever saw a Liverpool fan with some Munich joke on the back there's no way I wouldn't be saying something. United fans there should be doing the exact same with him, that is a disgrace.
United lost the game 2-1, with City captain Ilkay Gundogan putting on a stellar show by grabbing both of City's goals.
The German gave his side the lead after just 13 seconds with the fastest ever FA Cup final goal.
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