Law enforcement in Portland, Oregon have declared a riot as about 200 demonstrators protested the acquittal of a teen who killed two people and injured another in Wisconsin.
The Multnomah County Sheriff's Office on Friday said the protesters were breaking windows, throwing objects at police and talking about burning down a local government building in downtown Portland, KOIN TV reported, but the crowd had dispersed by about 11pm.
Several people were given citations, the Portland Police Bureau said, but only one person who had an outstanding warrant from another matter was arrested.
The protesters gathered following the acquittal of Kyle Rittenhouse, 18, in Kenosha, Wisconsin. Rittenhouse killed two people and injured another during a protest against police brutality in Wisconsin last year.
Protests have been held in several other US cities nationwide over the verdict, including New York, Los Angeles and Chicago.
About 1000 people marched through downtown Chicago on Saturday afternoon, organised by Black Lives Matter Chicago and other local activist groups.
According to the Chicago Tribune, protesters held signs saying, "STOP WHITE SUPREMACY" and "WE'RE HITTING THE STREETS TO PROTEST THIS RACIST INJUSTICE SYSTEM" with a picture of Rittenhouse carrying a weapon.
In North Carolina, dozens of people gathered on Saturday near the state Capitol building to protest the verdict, the Raleigh News & Observer reported.
Speakers led the crowd of about 75 people in chants of "No justice, no peace!" and "Abolish the police!"
Police officers on motorcycle accompanied the protesters and blocked traffic for them as they marched down a street past bars and restaurants.
After the murder of George Floyd last year by police in Minneapolis, there were ongoing, often violent protest in Portland.
Some activists complained the police were heavy-handed in their response. Shortly after the Rittenhouse verdict, Portland Police Bureau Chief Chuck Lovell said that officers were working on plans for Friday night and the weekend.
By about 8.50pm, about 200 protesters had gathered in downtown Portland and blocked streets. By 9pm, windows were broken and doors of city facilities were damaged.
The Multnomah County Sheriff's Office designated the event a riot, and said in a news release early on Saturday morning that some demonstrators had thrown urine, water bottles and batteries at deputies.