Authorities say the biography on an Instagram account believed to belong to the gunman who killed two students at his California school said, “Saugus, have fun at school tomorrow.” Los Angeles County sheriff’s officials say the message was posted on Thursday but it’s unclear. Authorities say off-duty officers whose children went to Saugus High School were the first on scene and provided first aid to the victims. A 16-year-old student shot five classmates and then himself. It's unclear if they had any relationship, and a motive is unknown.