A shooting took place at Six Flags America in Gurnee which left two people hospitalised.
The incidents took place at 7:50 pm at the time the park was closing,
The shooter was in the vehicle in a parking lot and immediately drove away after shooting.
Video on social media showed parkgoers hiding and crouched down where they were standing in line.
Witnesses shared that they saw parkgoers running away after hearing the gunshots.
"I thought there were fireworks right away. Then we saw hundreds of people running," said Charlie Donda.
"It was pretty scary but we are safe."