Amid the unrest and protests following the shooting of an unarmed black teenager by a police officer, authorities say a knife-wielding man was shot and killed by an officer today in St. Louis.

Fox2Now reported:

Authorities say a man tried to rob the 5-Star Market convenience store with a knife.

The store owner says he got into a dispute with the man.

Police were called but the suspect refused to put down the weapon. He tried to attack police and was shot and killed.

Watch the clip from The Real Story with Gretchen Carlson above and stay with Fox News Insider for updates.

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