Seven of the wounded were taken to hospitals in serious to critical condition, fire department spokesman Larry Merritt told the Chicago Sun-Times.

Police Superintendent David Brown told reporters that the Sunday afternoon shooting of the man who had opened fire on officers apparently prompted a social media post that urged people to form a car caravan and converge on the business and shopping district.

The victims range in age from 16 to 48 and suffered ``different and various gunshot wounds to their bodies.''