Aug 19, 2014 2:57 PM by NBC News
A police officer was involved in a shooting Tuesday in St. Louis, about three miles from where Michael Brown was shot and killed in the turbulent suburb of Ferguson, police confirmed.
There was a heavy police presence at the scene, and police marked off the intersection with yellow tape.
Chief Sam Dotson of the St. Louis metropolitan police said on Twitter that the suspect had brandished a knife at police.
Further details were unclear.
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