Around 1:30 a.m. Sunday, the Peoria County Sheriff's Office responded to reports of multiple shots fired at the Peoria Palace Skating Rink in Mossville.
Authorities say callers also reported a fight in progress.
When they arrived, sheriff's deputies found a large crowd and about 100 cars fleeing the scene.
Amongst the crowd were two victims with non life-threatening gunshot wounds, and the victim of a beating.
All three victims were juveniles. Their identities are not being released.
The investigation is ongoing.