Utah 50501, the organizers of Saturday's protest in downtown Salt Lake City, say there was an "imminent threat" to protesters before the deadly shooting.

SALT LAKE CITY (AP) — A military veteran who was trying to stop an alleged gunman and inadvertently shot and killed a demonstrator at a Salt Lake City “No Kings” rally was a “safety volunteer” for the demonstration, according to police and organizers.

Utah 50501, the organizers of the No Kings protest that took place in Salt Lake City on Saturday, confirmed the “peacekeeper” who was involved in a deadly shooting during the protest

Some 10,000 people gathered in Salt Lake City for a "No Kings" rally and march as President Donald Trump was overseeing a military parade in Washington, D.C. About an hour into the march, shots were fired.

Salt Lake City police said​ in a post to social media that the shooting was "possibly associated" with a "No Kings" demonstration.

A fatal shooting in Salt Lake City, a targeted political attack in Minnesota and more; here's what happened during the national day of protest.

A crazed gunman was taken into custody Saturday night after allegedly opening fire on thousands of protesters during a "No Kings" march, which left one person critically injured, Utah police said.

Organizers are accusing the president of putting on the parade as a show of dominance. The protests were peaceful, but came against the backdrop of assassinations in Minnesota.