Protesters rally near the White House during a protest over the death of George Floyd in Washington D.C., the United States, on May 30, 2020. (Xinhua/Liu Jie)

WASHINGTON, June 1  -- Washington, D.C. Mayor Muriel Bowser said on Sunday night she was imposing a citywide curfew amid rising tensions between protesters and police outside the White House over the death of George Floyd, an unarmed black man in Minneapolis police custody. ■