Prominent U.S. civil rights activist the Rev. Al Sharpton told mourners on Thursday that George Floyd's fatal encounter with police and the nationwide protests his death ignited marked a reckoning for America over race and justice, demanding, "Get your knee off our necks."

Memorial tributes to Floyd in Minneapolis, where he was killed on May 25, and in New York City's borough of Brooklyn, a major flashpoint for demonstrations stirred by his death, came as protesters returned to the streets of several U.S. cities for a 10th straight day, including Atlanta, Washington, Denver, Detroit and Los Angeles.

The gatherings, while boisterous at times, were for the most part orderly, in contrast to several previous nights punctuated by sporadic arson, looting and clashes between protesters and police.