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 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. “Our victim was not the intended target,” Salt Lake City Police Chief Brian Redd said, “but rather an innocent bystander participating in the demonstration”

A man disguised as a police officer shot and killed Minnesota Rep. Melissa Hortman and her husband, and injured Sen. John Hoffman and his wife. The suspect, Vance Boelter, is still at large, and authorities found a manifesto in his car listing other potential targets.