ONTARIO, Ore. (AP) — A man who tested positive for COVID-19 has died in custody at the Snake River Correctional Institution in eastern Oregon, state officials said.

The Oregon Department of Corrections said the man who died Monday is the twelfth person to die in state custody after testing positive for the disease.

The man, whose name was not released, was between 65 and 75 years old.

The Oregon State Police have been notified, and the Medical Examiner will determine the cause of death, which is standard procedure.

Nearly 1,100 inmates at state corrections facilities had tested positive for COVID-19 as of Friday, according to the Department of Corrections. More than 260 corrections staff members have tested positive.

Health screening processes are in place for staff before they are allowed to enter facilities, corrections officials said. Continued cleaning and disinfecting takes place multiple times a day, according to officials.