The video in the player above is from a previous report.
The male body was found at Rainbow beach near the 3100-block of 77th Street on around 6:56 a.m.
The body was later identified as 16-year-old Yoni Danilo Montes Santos, the Cook County Medical Examiner's Office said.
The discovery came as Chicago police and fire officials have been searching for a 16-year-old boy who went missing on Sunday at Rainbow Beach.
It's not yet clear if Santos is the missing swimmer searchers have been looking for. ABC7 has reached out to Chicago police to confirm if the cases are now officially related.
No further information was immediately available.
READ MORE | Teen missing in Lake Michigan at Rainbow Beach; water search ends due to dangerous conditions: CPD
This is a breaking news story. Check back with ABC7 Chicago for updates.