The latest action follows three days of peaceful protests and three nights of violence in the city that has been rocked since Friday, when a judge announced he found Jason Stockley not guilty in the 2011 death of Anthony Lamar Smith.
Hundreds of riot police mobilized downtown late yesterday, arresting more than 80 people and seizing weapons amid reports of property damage and vandalism. The arrests came after demonstrators ignored orders to disperse, police said.
Earlier Sunday, more than 1,000 people had gathered at police headquarters then marched without trouble through downtown St Louis, the posh Central West End, and the trendy Delmar Loop area of nearby University City. Protesters also marched through two shopping malls in a wealthy area of St Louis County.
By nightfall, most had gone home. The 100 or so people who remained grew increasingly agitated as they marched back toward downtown. Along the way, they knocked over planters, broke windows at a few shops and hotels, and scattered plastic chairs at an outdoor venue.
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One officer suffered a leg injury and was taken to a hospital. His condition wasn't known.
Soon afterward, buses brought in additional officers in riot gear, and police scoured downtown deep into the night, making arrests and seizing at least five weapons, according to O'Toole. Later, officers in riot gear gathered alongside a city boulevard chanting "whose street, our street", a common refrain used by the protesters, after clearing the street of demonstrators and onlookers.
"We're in control. This is our city and we're going to protect it," O'Toole said.
Early today, more than 150 protesters marched arm-in-arm, some carrying signs, to city hall. Police turned traffic away as the marchers blocked a busy St Louis street during the rush hour crush. Once at city hall, they found their voices, chanting: "I know that we will win." The protesters then marched four blocks to a city court building, where they chanted again, then dispersed. The next protest is scheduled for today evening in University City.