Salt Lake City police are investigating two self-described "peacekeepers" after a fatal protest shooting left one dead and one injured.

Arturo Gamboa, 24, is taken away in handcuffs on a gurney and yells that he was shot during the “No Kings” protest and march in Salt Lake City on Saturday. A 39-year-old man died Saturday after being shot during the protest, police said. (Scott G Winterton, Deseret News)

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

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

The Salt Lake City Police Department is investigating a shooting that occurred during a “No Kings” protest Saturday night, leaving one person with critical injuries. An estimated 10,000 people were marching at the time.

An estimated 10,000 people were in attendance at the “No Kings” rally that began in Pioneer Park and marched north through the downtown area, the Salt Lake City Police Department said. Gunfire was heard at around 8 p.m., with video posted online showing protesters fleeing in terror.

The shooting reportedly occurred during a “No Kings” protest in Salt Lake City, CBS News reported ... ongoing trial coverage and details of intriguing unsolved cases. Utah Gov.

Denver police say they believe the vast majority of people participating in the ‘No Kings’ Protest left after the event ended around 4 p.m. FOX31's Alliyah Sims spoke with one demonstrator who said the goal was to peacefully share their message.