Police in the US city of St Louis controlling demonstrations over the killing of an unarmed teenager by an officer made 31 arrests overnight and came under "heavy" gunfire at times, the captain in charge at the scene has said.
Capt. Ron Johnson, of the Missouri State Highway Patrol said that only a small number of protesters were bent on "criminal acts" and that the majority of demonstrations had been peaceful.
"It is criminals who throw Molotov cocktails, fire shots and endanger lives," Johnson said. "These are not acts of protesters but acts of violence." Capt. Johnson said, blaming criminals that had travelled to the suburb from New York and California intent on disrupting the peace.
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