The volunteer fired three rounds at Arturo Gamboa, 24, who allegedly brandished a rifle at Saturday's crowd. The gunshots hit both Gamboa and a bystander, Arthur Folasa Ah Loo, police

A demonstrator was shot and killed at Salt Lake City’s “No Kings” protest when a man believed to be part of the event’s peacekeeping team fired at another man allegedly aiming a rifle at protestors, authorities said Sunday.

Officers responded to gunshots at a “No Kings” march in Salt Lake City, Utah and took three people into custody in relation to the incident. One person was transferred to the hospital with life-threatening injuries.