Demonstrations sprang up across the country after a grand jury declined to bring charges against the police officer who shot and killed 18-year-old Michael Brown.
In Ferguson, Missouri, where the shooting took place, at least 60 people were arrested during a violent evening that left buildings burned and windows shattered.
There were also arrests in nearby St. Louis.
In Oakland, demonstrators shut down a major freeway and some threw rocks and bottles at officers.
And in Southern California, protesters laid down in the street in front of the Beverly Hills Hotel, and gathered outside the downtown headquarters of the LA Police Department.
Another group in South Los Angeles chanted, "Hands up, don't shoot."
KPCC reporter Erica Aguilar was there and spoke to a few of the demonstrators.