Utah 50501, the organizers of Saturday's protest in downtown Salt Lake City, say there was an "imminent threat" to protesters before the deadly shooting.

Arthur Folasa Ah Loo, 39, a Samoan-born fashion designer, was participating in an anti-Trump protest in Salt Lake City on Saturday when he was shot by a man working security, the police said.

Organizers of the "No Kings" protest confirmed the "peacekeeper" who fatally shot a bystander at the Salt Lake City march was a volunteer and military veteran.P

Explore an interactive map of the “No Kings” protest and shooting in downtown Salt Lake City below. Some 10,000 people gathered in Salt Lake City for a "No Kings" rally and march as President Donald Trump was overseeing a military parade in Washington, D.C. About an hour into the march, shots were fired.

A fatal shooting in Salt Lake City, a targeted political attack in Minnesota and more; here's what happened during the national day of protest.

Salt Lake City police are investigating two self-described "peacekeepers" after a fatal protest shooting left one dead and one injured.

At 7:56 p.m., Redd said a police officer heard shots near 151 S. State St. First responders soon found Ah Loo injured on the ground. Medics quickly surrounded him, offering aid, but he died later at a local hospital.

Cities large and small across the U.S. saw crowds gather Saturday for planned "No Kings" protests against President Trump.

Auli'i Cravalho took to Instagram to share a moving tribute to fashion designer Afa Ah Loo, who was fatally shot at a "No Kings" protest on Saturday. The actress reflected on wearing the Project Runway alum's designs at the Moana 2 premiere in November.

The largely peaceful protests during the "No Kings Day" demonstration in downtown Los Angeles took an intense turn in the afternoon. Police ordered the crowd to disperse at about 4:15 p.m. PDT near Alameda Street and Temple Avenue, according to the Los Angeles Police Department's Central Division.