Springfield Police say officers responded to an active shooter situation at the Sangamon County Juvenile Detention Facility at around 7:45 Saturday night.
Authorities were also told an armed individual had possibly shot another person and was holding a hostage.
Police say upon arriving, officers encountered the armed individual in the entrance to the facility. They say an officer fired and struck the suspect, who was given medical assistance at the scene. He then taken by ambulance to HSHS St. John' Hospital where he later died.
His name has not been released. The Sangamon County Coroner has confirmed the death of a 17 year old male. An autopsy determined he died from "multiple gunshot wounds."
In an exclusive interview with the State Journal-Register,Police Chief Ken Scarlette said officers encountered the suspect with a hostage. Scarlette said he then pointed a gun at the police when an officer fired and struck the suspect.
A second individual suffered a gunshot wound and was treated and released, authorities said.
The Illinois State Police is handling the investigation. According to a statement released Sunday, Springfield police say the officers involved have been placed on restricted duty, per departent policy.
