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.

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 was a safety volunteer and military veteran.

Salt Lake City police are investigating the roles of two self-described "peacekeepers" following a fatal shooting at Saturday's protest that left one person dead and another injured, raising questions about unauthorized security at public demonstrations.

At least one person was critically injured in a shooting during a ‘No King’ protest in Salt Lake City, Utah. Salt Lake City police said they have taken three people into custody after the “No Kings” m

Detectives believe the victim was at the demonstration as a bystander and “was not the intended target of the gunfire.”