Pictures circulating on social media showed what appeared to be a Manchester United fan wearing a shirt with the number 97 accompanied by the words: “Not enough”.

There were 97 victims in the 1989 stadium crush at the FA Cup semi-final between Liverpool and Nottingham Forest at Hillsborough, Sheffield.

An inquest jury ruled in 2016 that the Hillsborough victims were unlawfully killed following police errors in controlling the crowd, after a decades-long cover-up.

After photos of the man went viral on Twitter, the Metropolitan Police stepped in at the venue, where Manchester City defeated Manchester United 2-1.

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The force wrote: “We are aware of this and have worked proactively with officials at @wembleystadium to identify the individual.

“He has been arrested on suspicion of a public order offence and taken into custody.”

Within 45 minutes, the Met Police tweet had been seen more than one million times.