A Snohomish County, Wash., sheriff's spokeswoman says a 41-year-old male inmate has died in the medical unit of the county jail.

Shari Ireton said corrections staffers found the inmate not breathing when they checked on him Thursday morning. Medics were unable to revive him with CPR.

The spokeswoman says the sheriff's office will conduct a standard death investigation.

The medical examiner's office will identify the inmate and determine his cause and manner of death.