CHICAGO (CBS) — Illinois State Police are investigating two related shootings that left a child with a gunshot graze wound.

The first shooting was around 3:30 a.m. Sunday on the Sibley westbound ramp to I-57 northbound, police said. The second shooting was around 4 a.m. near 119th and Halsted in Chicago.

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ISP officers responded to Calumet Park to speak with the victims involved in both shooting.

Two men in one vehicle were not injured. Five people were in a second vehicle: two women, one man and two small children. One of the children suffered injuries that are not life threatening due to a gunshot graze wound. Medical treatment for the child was declined.

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The Sibley westbound ramp to I-57 was shut down for an investigation from 4:05 a.m. until 7:48 a.m.

The investigation is ongoing.

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Anyone who witnessed the shooting or has any knowledge of the shooting is asked to contact ISP at (847)294-4400. Callers can remain anonymous.