Chicago fire officials were called to Locke Elementary School in Chicago's Montclare neighborhood after multiple students fell ill. The school is located in the 2800-block of North Oak Park Avenue.
A total of 10 students were looked at, but only four were transported to hospitals, officials said.
Chopper 7-HD was over the scene of the school, where multiple fire trucks and ambulances were parked.
There is no information yet as how the students got sick.