A demonstrator holds his hands in the air as police officers fire tear gas during a protest against the death of George Floyd in Minneapolis, the United States, May 31, 2020. (Photo by Angus Alexander/Xinhua)

Demonstrators are arrested during a protest against the death of George Floyd in Minneapolis, the United States, May 31, 2020. (Photo by Angus Alexander/Xinhua)

A demonstrator is arrested during a protest against the death of George Floyd in Minneapolis, the United States, May 31, 2020. (Photo by Angus Alexander/Xinhua)

Protestors demonstrate against the death of George Floyd in Minneapolis, the United States, May 31, 2020. (Photo by Angus Alexander/Xinhua)

Riot police officers stand in formation during a protest against the death of George Floyd in Minneapolis, the United States, May 31, 2020. (Photo by Angus Alexander/Xinhua)

A sign reading "Justice for George" is seen on a fence as riot police officers approach a protest against the death of George Floyd in Minneapolis, the United States, May 31, 2020. (Photo by Angus Alexander/Xinhua)

Demonstrators hold placards during a protest against the death of George Floyd in Minneapolis, the United States, May 31, 2020. (Photo by Angus Alexander/Xinhua)

Demonstrators run through tear gas fired by riot police during a protest against the death of George Floyd in Minneapolis, the United States, May 31, 2020. (Photo by Angus Alexander/Xinhua)