An "innocent bystander" at the "No Kings" demonstration in downtown Salt Lake City was shot and killed Saturday, police said

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.

An estimated 10,000 people were in attendance at the “No Kings” rally that began in Pioneer Park and marched north through the downtown area, the Salt Lake City Police Department said. Gunfire was heard at around 8 p.m., with video posted online showing protesters fleeing in terror.