Protesters staged large-scale demonstrations across the country on Sunday, expressing outrage at the death of George Floyd in Minneapolis and, more broadly, anger at police brutality. Some cities, including Minneapolis, Atlanta and Seattle, saw clashes with police, buildings and cars set afire, and looting.

By evening, many demonstrations had given way to another night of violence and destruction, with protesters ignoring curfews imposed in dozens of cities. Police used tear gas and stun grenades and fired rubber bullets in attempts to disperse the crowds.

Floyd, a 46-year-old black man, died in police custody last Monday. Video shows a Minneapolis police officer had his knee on Floyd's neck for nearly nine minutes shortly before his death.

Tensions were already simmering following the deaths of Ahmaud Arbery in February and Breonna Taylor in March.

Arbery, a 25-year-old black man, was jogging through a Glynn County, Ga., neighborhood when he was shot dead. Three white men were arrested last month after state investigators took over the case from local authorities.

Protests also continued for a fourth straight night in Louisville, as activists call for justice for Taylor. Police shot and killed the 26-year-old black woman in her home.

In Minneapolis, a semitrailer plowed through a crowd of protesters marching on an interstate highway near downtown that had been closed to traffic.

Authorities say no one was injured when the truck drove into the crowd at a high speed, westbound on Interstate Highway 35.