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 teenager opened fire Sunday night at a Utah festival outside Salt Lake City, killing three, including an 8-month-old infant. Officials with the West Valley City, Utah Police Department (WVCPD) said five people were shot in the incident,

As prosecutors consider potential criminal charges against the man whose alleged actions caused the shooting death of another man during Saturday's "No Kings" protest, the investigation into the so-called "peacekeeper" who actually fired the fatal shot also continues.