Mass shootings and acts of violence occurred across the United States over the weekend, with significant incidents in various cities. In Chicago, at least 60 people were shot, while in Kellogg, Idaho, four people were found shot to death. A shooting in St. Louis left a 17-year-old dead and 11 other teenagers injured. Washington state witnessed a shooting at a campground near a music festival, resulting in two deaths and two injuries. In central Pennsylvania, a state trooper was killed and another critically wounded in separate attacks. Southern California, Baltimore, San Francisco, Philadelphia, and Milwaukee also experienced shootings, resulting in injuries. The causes of the violence remain under debate.