The Kankakee County Sheriff's Office said they discovered 30 to 40 people walking along the side of the highway wrapped in blankets around 7:30 a.m.
After talking with the people, officers determined they were Venezuelan migrants were dropped off at a gas station at 4:30 a.m.by a bus that came from El Paso, Texas.
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The migrants had no money or food, police said.
They were taken to Midway Airport to be connected with resources in Chicago.
The Kankakee County Sheriff is now working to identify that bus company involved, and county officials there have filed an emergency declaration in anticipation of more drop-offs.