Authorities say they are investigating a death at the Okeechobee County Jail.
Deputies found an unresponsive woman inmate Wednesday morning, according to the sheriff's office.
She was identified as 41-year-old Michelle Lee Jones who was being detained for a violation of probation.
The sheriff's office said detention deputies performed CPR until fire rescue arrived.
Jones was taken to Raulerson Hospital where she later died, a sheriff's office spokesperson said.
The St. Lucie County Medical Examiner's Office will determine the exact cause of death, the sheriff's office said.