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

The Salt Lake City Police Department provided an update about the “peacekeepers” who were involved in the shooting that happened at the ‘No Kings’ protest in Salt Lake City

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

Saturday marks the first full day of Marines on duty in Los Angeles, one week after protests against Immigration and Customs Enforcement raids ignited in LA.

The shooting at Salt Lake City's "No Kings" project told through the lens of on-the-scene Salt Lake Tribune photographers.

A man who was believed to be part of a peacekeeping team for the "No Kings" protest in Salt Lake City shot at a person who was brandishing a rifle at demonstrators, striking both the rifleman and a bystander who later died at the hospital,

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)

Note to readers •The Salt Lake Tribune has made this story free to all. Some 10,000 demonstrators marched against President Donald Trump in downtown Salt Lake City on Saturday evening. The vast majority of them were peaceful.

Arthur Folasa Ah Loo, who was shot dead during the 'No Kings' protest, was a Samoan fashion designer. He competed on season 17 of Project Runway. Know more details about him.