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.

A bystander was fatally shot after security members at the demonstration confronted a man who was running toward the crowd with an AR-15-style rifle, the police said.

One person was hospitalized with "life-threatening injuries" after gunshots were fired during Saturday's "No Kings!" protest in downtown Salt Lake City.The latest: The Salt Lake City Police Department said the shooting occurred just before 8pm near 151 S.

At 7:56 p.m., Redd said a police officer heard shots near 151 S. State St. First responders soon found Ah Loo injured on the ground. Medics quickly surrounded him, offering aid, but he died later at a local hospital.

The largely peaceful protests during the "No Kings Day" demonstration in downtown Los Angeles took an intense turn in the afternoon. Police ordered the crowd to disperse at about 4:15 p.m. PDT near Alameda Street and Temple Avenue, according to the Los Angeles Police Department's Central Division.

The Salt Lake City Police Department reported a shooting during the “No Kings” protest at 8 p.m. The peaceful bystander who was shot, Arthur Folasa Ah Loo, later died at the hospital. He is survived by his wife and two young children.

Most of the "No Kings" protests across the country were peaceful, however, one person has died from a shooting in Salt Lake City.

Remaining Minnesota “No Kings” events have been called off given that police are still searching for the suspect in the shooting of two Democratic lawmakers, organizers said in [posts](