This is at MetLife Stadium in East Rutherford, New Jersey. They were having Summer Jam featuring multiple acts. But the event was oversold, so when people got to the event and found they could not get tickets, some fights like the following broke out:

That resulted in the entrances being closed, leaving about 1000 people outside, including some paying customers who were then angry that they couldn’t get into the concert.

People began rioting and throwing bottles and objects at the police who tried to control the crowd:

Police had to deploy an LRad and tear gas to disperse rioters:

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