A man shot and killed on Chicago's Southwest Side was identified by the Cook County Medical Examiner's Office.
An 18-year-old was killed and three other teens were injured a south suburban shooting on Saturday night, police said.
State police released new information about the shooting that left a 67-year-old security guard dead in northwest Indiana.
Several gatherings were taking place, including a reunion for former residents of Robert Taylor Homes, when the shooting happened.
Chicago police are investigating a deadly shooting on the city's South Side Saturday.
Family members of a 67-year-old security guard fatally shot by police at a northwest Indiana transit station are demanding answers about the circumstances that led to the shooting.