A peaceful march through LA's Hollywood and Sunset Boulevards was marred by looting as groups broke off and targeted stores in nearby areas.
Another peaceful demonstration in Van Nuys also ended in reports of looting and arrests.
The city also saw demonstrations in Hollywood, West Hollywood and downtown LA.
The protests continued in the city despite a 6pm curfew, and businesses in some parts have been boarded up, bracing for another night of looting.
LA saw violence and theft through the weekend as groups burnt police cars, confronted officers and ransacked stores.
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