Shootings left at least four men dead and 9 other people wounded across the Saturday night and Sunday morning.
The violence was largely confined to the South and West Sides and three of the incidents had more than one victim, according to authorities.
The most recent shooting happened about 4:01 a.m. in the Cabrini-Green neighborhood – just north of Chicago Avenue on Cambridge Avenue. Two men, one 25 and the other either 23 or 24, were shot and taken to Northwestern Memorial Hospital. The older of the two was dropped off there and died of his wounds, and the other was taken there in an ambulance with a wound to the leg.