Tecumseh inmate died Wednesday morning

An inmate in the Nebraska Prison System has died. 

Prison officials say 74-year-old John Zalme died Wednesday morning at the Tecumseh State Correctional Institution.

Zalme was serving a sentence of 130 to 229 years for charges out of Lancaster County that included assault and several weapons charges. 

The cause of death has yet to be determined. 

There is an investigation underway.