A protest near the White House on Sunday night. Photo: Alex Wong/Getty Images

Most external lights at the White House were turned off late Sunday as the D.C. National Guard was deployed and authorities fired tear gas at hundreds of protesters nearby, per the New York Times.

What's happening: It's one of several tense, late-night standoffs between law enforcement and demonstrators in the United States over the death of George Floyd and other police-related killings of black people.

Where it stands: Atlanta; Detroit; Indianapolis; D.C.; Los Angeles; Myrtle Beach, South Carolina; Denver; Santa Monica, California; Chicago; Dallas; Philadelphia; San Jose; Salt Lake City; and Cleveland have imposed curfews for Sunday night. Several curfews will last until Monday, NBC News reports.

Editor's note: This article has been updated with new details throughout.

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