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.

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

Five people were shot, three fatally, at the festival in Utah's West Valley City after an altercation broke out between two groups of people.

A crazed gunman was taken into custody Saturday night after allegedly opening fire on thousands of protesters during a “No Kings” march, which left one person critically injured, Utah