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More than 2,000 law enforcement officers were injured in the first weeks of protests over the summer following the in-custody death of George Floyd, according to a report from the Major Cities Chiefs Association. 

The Association detailed the unrest and compiled data from protests between May 25 and July 31 in MCCA member cities, Fox News reports. 

During that period, there were 8,700 protests nationwide; 574 were declared riots with violence and other criminal acts. The violence was limited to 7% of protests, the report said. 

In most cases, the criminal acts were the work of individuals or small groups that infiltrated larger demonstrations, according to the organization. 

There was violence in more than 62% of Portland, Ore., demonstrations. The city had weeks of nightly protests far beyond the July 31 cutoff for the MCAA report.