CHICAGO (AP) — Chicago Police say five people including a 15-year-old boy have been killed in separate shootings from Friday afternoon into early Saturday.

Police said the boy was in the street in the Jeffery Manor neighborhood on the city’s South Side when a vehicle pulled up Friday afternoon and someone inside fired a gun, striking the teen in the back. The Chicago Tribune reports that the boy’s identity has not been released.

A total of 22 people, including the five killed, had been wounded by gunfire by early Saturday afternoon. No arrests have been announced.

The shootings follow a particularly violent July 4 holiday weekend that ended with more than 17 people killed and 70 more wounded.