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.

Note to readers •The Salt Lake Tribune has made this story free to all.A marcher critically wounded in a shooting at Salt Lake City’s 10,000-strong “No Kings” protest on Saturday night has died, police reported Sunday afternoon.