YORK, Neb. (AP) — An inmate at the Nebraska Correctional Center for Women in York died recently at a Lincoln hospital.

A York news outlet reports that 36-year-old Amy Katzberg died Wednesday. Assistant Warden Tim Siemek confirmed the death on Friday.

Siemek says Katzberg had been receiving medical treatment in Lincoln since May 16 for an unnamed medical condition.

Katzberg was serving a sentence of four to 10 years for felony theft in Lancaster County. She had been incarcerated since November 2010.

A grand jury will be called to investigate Katzberg’s death because she died in state custody.