The Oregon Corrections Department says the state medical examiner's office has determined that the July 3 death of a female inmate at an Oregon prison was a suicide.

The agency said Thursday that 18-year-old Precious Anderson entered state custody on May 9 out of Linn County. She was serving time at the Coffee Creek Correctional Facility for assaulting a public safety officer. Her earliest release date was Dec. 3, 2014.

The inmate reportedly was alone in her cell at the Wilsonville prison. The agency said no other details were being released.

Coffee Creek is Oregon's only women's prison. It houses 1,200 prisoners in minimum- and medium-security buildings.