In Santa Monica, upscale stores were looted along the city's popular Third Street Promenade before police moved in to make arrests. The vandalism followed a largely peaceful march earlier in the beachside city. Further south, in the Los Angeles suburb of Long Beach, a group of young men and women smashed windows of a shopping mall and looted stores before they were dispersed ahead of a 6 p.m. curfew.
In Washington, D.C., protesters set fires near the White House, the smoke mixing with billowing clouds of tear gas as police sought to clear them from the area.
Sporadic violence broke out in Boston following peaceful protests as activists threw bottles at police officers and lit a cruiser on fire. Philadelphia announced a 6 p.m. to 6 a.m. curfew after a day of protests and looting.
Several hundred demonstrators marched through downtown Miami chanting: "No justice, no peace," past a detention center where inmates could be seen in the narrow windows waving shirts.
The demonstrations brought out a diversity of people, a point one young black woman noted at a march in Culver City, California on Sunday. "It means a lot to see people other than black people joining the demonstration," said Candace Collins.
Protests spread around the globe, with events in London and Berlin on Sunday and others on Monday including in New Zealand, Australia and the Netherlands.
The eruptions of violence have not let up despite the arrest on Friday of former Minneapolis police officer, Derek Chauvin, 44. He has since been charged with third-degree murder. Three other officers involved in Floyd's arrest have yet to be charged.
In New York City, police arrested about 350 people and 30 officers suffered minor injuries during clashes. Mayor Bill de Blasio said police conduct was being investigated, including widely shared videos showing a police vehicle lurching into a crowd of protesters who were pelting it with debris in Brooklyn.
De Blasio said he had not seen a separate video showing an officer pulling down the mask of a black protester to spray something in his face.
Among those arrested for unlawful assembly on Saturday night was de Blasio's 25-year-old daughter, Chiara, according to a New York Police Department source, who said she was issued a "desk appearance ticket" and released.
Protests have also flared in Chicago, Seattle, Salt Lake City, Cleveland and Dallas, where rioters were seen on video beating a store owner who chased them with a large machete or sword. Police said on Sunday he was in stable condition.
Thousands of people gathered peacefully on Sunday afternoon for a rally in St. Paul as state troopers surrounded the state capitol building. About 170 stores in the city have been looted, its mayor told CNN.
While covering the protests in Minneapolis on Saturday night, two members of a Reuters TV crew were hit by rubber bullets and a Reuters photographer's camera was smashed as attacks against journalists covering the unrest intensified.
In response to the protests, Target Corp announced it was temporarily closing 100 stores, about 30 of them in Minnesota.
The administration of President Donald Trump, who has called protesters "thugs," will not federalize and take control of the National Guard for now, national security adviser Robert O'Brien said on Sunday.
Trump said on Sunday the U.S. government would designate anti-fascist group Antifa as a terrorist organization. It was not clear how many of the protesters participating in demonstrations are from Antifa.
"Get tough Democrat Mayors and Governors," Trump said on Twitter on Sunday afternoon. "These people are ANARCHISTS. Call in our National Guard NOW."
National Guard soldiers were deployed in Atlanta, Minneapolis and Los Angeles, as well as Santa Monica.
