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, authorities said Sunday.

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.

Utah resident Arthur Folasa Ah Loo, 39, died Saturday after he was shot during a large “No Kings” protest in downtown Salt Lake City. Ah Loo — an “innocent bystander,” fashion designer and former “Project Runway” contestant — was shot by a member of a “peacekeeping” group who fired at a