Police are investigating the shooting.Salt Lake City police are investigating the roles of two self-described "peacekeepers" following a fatal shooting at Saturday's protest that left one person dead and another injured,

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.

Arthur Folasa Ah Loo was a former contestant on “Project Runway,” whose designs were beloved by celebrities from “Real Housewives” to “Moana” star Auli’i Cravahlo.

Arthur Folasa Ah Loo aka Afa Ah Loo tragically passed away after being mistakenly shot at a 'No Kings' protest in Salt Lake City over the weekend.

SALT LAKE CITY ( KTVX) — A person is dead after they were struck by crossfire during an incident at a “No Kings” protest in downtown Salt Lake City on Saturday, police have confirmed.

Protestors numbering in the thousands have begun their march at Scissortail Park, heading to City Hall. The lines of people are stretching across several blocks. The Oklahoma City "No Kings" protest march begins at 9 a.m. at the corner of Oklahoma City Boulevard and Hudson Avenue.

In New York City, the biggest "No Kings" demonstration began at Bryant Park on Saturday before moving down Fifth Avenue to Madison Square Park.

The estimated 70,000+ peaceful demonstrators had various grievances with the Trump administration, but immigration policy was the prevailing theme.

Nationwide non-partisan No Kings protests on Flag Day follow chaotic demonstrations in Los Angeles over the immigration enforcement actions. Protester numbers grew and tempers heated, with some clashing with law enforcement, after Trump mobilized the California National Guard and the U.S. Marines.

Crowds of protesters gathered nationwide Saturday for ‘No Kings’ protests, opposing President Donald Trump and his administration’s policies. The demonstrations coincided with the Army’s 250th anniversary parade and Trump’s birthday.