Twenty additional agents from the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) have been deployed to Chicago, where the city saw its highest murder rate of the past 20 years in 2016.

The move comes a week and a half after President Trump warned he would take federal action if the city did not combat violence that was continuing its upward trajectory in 2017. It’s unknown whether the move was in response to or directed by Trump.

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