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.

SALT LAKE CITY (KUTV) — The man who was fatally shot during the Salt Lake City "No Kings" protest was a fashion designer with a local company and a former contestant on Bravo's "Project Runway." Police identified the victim of Saturday's shooting as Arthur Folasa "Afa" Ah Loo.

An "innocent bystander" was killed after being caught in the crossfire in a shooting at the "No Kings" protest in Salt Lake City, authorities said.

Project Runway's Arthur Folasa Ah Loo died after being shot during the 'No Kings' protest in Salt Lake City, according to police reports

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

The Salt Lake City Police Department confirmed it is investigating the role of the two “peacekeepers” who fired their weapons at a suspect who now faces murder charges.

SALT LAKE CITY ( KTVX) — A person is dead after they were struck by crossfire during an incident at a “No Kings” protest in downtown Salt Lake City on Saturday, police have confirmed.

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

A 16-year-old boy shot five people in a confrontation between two groups at a carnival in a Salt Lake City suburb Sunday, killing three of them including an 8-month-old infant. Police say the

Arthur Folasa Ah Loo, 39, has died as the result of a gunshot wound he sustained Saturday in a shooting during a protest against President Donald Trump in Salt Lake City.

ONE person is in a life-threatening condition after being shot near a ‘No Kings’ demonstration as cops confirm three are in custody. Gunfire broke out near the march which was attended