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A Beyonce concert reportedly descended into violence tonight as a fight broke out, forcing stewards to form a 'human barrier' in the crowd.

The superstar's performance was under way at Hampden Park in Glasgow, Scotland, when concert -goers started 'scrapping', witnesses say.

Stewards in hi-vis jackets had to form a barrier in the stadium - which apparently prevented people from getting back to their seats, the Daily Record reports.

One appalled man tweeted: "Beyonce performance marred by fighting", later adding: "Beyonce fans = Scotland shame. Can't even go to a gig without scrapping."

Meanwhile, an eye witness told the Record's sister site Glasgow Live: "There is some sort of fight happening and there's a huge barrier of stewards."

Earlier in her massive Formation World Tour show, Beyonce had asked the Hampden crowd to observe a moment's silence following the Philando Castile shooting in the US.

(Image: Glasgow Live)

Some revellers took to Twitter this evening to complain about the barrier of stewards, saying they were preventing concert-goers who had left their seats from returning.

Julie Bryce tweeted: "Human barrier stopping people getting back to their seats at Beyoncé. Absolutely SHOCKING!!!"

Fans had been camped out overnight ahead of the hugely-anticipated show.

A Police Scotland spokesman said: "Officers have dealt with a number of incidents at the event, mostly minor."