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.

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,

Note to readers •The Salt Lake Tribune has made this story free to all. Some 10,000 demonstrators marched against President Donald Trump in downtown Salt Lake City on Saturday evening. The vast majority of them were peaceful.