Several hundred protesters gathered last night and continued marching into early today in the cities of Berkeley and Oakland, California, according to police.
Some smashed store windows and looted shops, while a fire was burning on one residential street in Berkley.
The marchers blocked a major highway as they moved to neighboring city of Oakland amid heavy police presence.
Berkeley police said protesters lobbed bottles and overturned trash cans, which they also set ablaze.
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Demonstrations turned violent Saturday in Berkeley, where police used tear gas after clashing with crowds who threw objects, looted shops and vandalized cars. Officials said several officers were injured.
Demonstrations have erupted across the United States over the past two weeks, sparked by a grand jury decision not to indict a police officer in Ferguson, Missouri after he shot dead an unarmed black teenager in August.
The white officer involved in that case was also not indicted by a grand jury last week, provoking a fresh wave of demonstrations in several US cities.
In another case, Akai Gurley, 28, was shot dead when a police officer opened fire in a dimly lit staircase at a New York apartment building as he walked with his girlfriend late on November 20. A grand jury is expected to consider the case.
High profile sports stars joined the condemnation over the weekend against the spate of recent killings, with several NFL and NBA players wearing T-shirts bearing the phrase "I can't breathe," which were the last words uttered by Garner as he was held in a chokehold.