NBC 5 has not independently verified the reports of the incident from police.
Residents of the neighborhood said they heard more than a dozen gunshots and then immediately after saw officers performing CPR on a person on the ground.
Police said the person was taken to Silver Cross Hospital where he was pronounced dead. The Will County Coroner's Office did not immediately confirm the fatality and further details, including the person's age or identity, were not available.
One witness said she saw officers shoot a man who looked to be between the ages of 19 and 21, hearing more than a dozen gunshots as she took cover inside her home.