UPDATE: The Tennessee Bureau of Investigation is working to determine how a Bradley County inmate died.

The TBI said Fawn Zanette Branham, 54, was found unresponsive in her cell Monday afternoon.

Correctional officers ad on-site medical staff tried to revive Branham, but they were unable to, a Bradley County Sheriff's Office spokesperson explained.

She was pronounced dead shortly after Bradley County Emergency Medical Services arrived at the jail.

"Per our agency’s protocol, the 10th Judicial District Attorney’s Office was immediately notified which led to the response of Tennessee Bureau of Investigation to conduct an investigation," a sheriff's office spokesperson explained.

Stay with Channel 3 for the latest updates on this developing story.