KENOSHA COUNTY, Wis. (CBS 58) -- An investigation is underway after an inmate died at the Kenosha County Jail Pretrial Facility. 

According to the Kenosha County Sheriff's Office, a correctional officer on Sunday, Nov. 3 discovered the 39-year-old inmate from Illinois unresponsive but still breathing in his cell. 

Medical staff was called but upon their arrival, the inmate was no longer breathing. Despite life-saving measures, the inmate was pronounced dead. 

Authorities say the 39-year-old man had been at the jail since Oct. 12. 

Preliminary investigations suggest that the death is not suspicious and did not involve any use of force by correctional staff.

The Racine County Sheriff’s Office has been assigned to lead the investigation under an agreement between the two agencies. All inquiries about this case should be directed to the Racine County Sheriff’s Office.

“We are committed to a thorough and transparent investigation and will provide further information as it becomes available,” said Sheriff Zoerner.

This investigation remains open and active.