Police officers from Department of State Hospitals, Coalinga arrested eight patients today at the facility on charges of possession of child pornography — and one additional patient on charges of assault and possession of manufactured alcohol, Department of State Hospitals officials said.

The nine arrests are related to an investigation that occurred at the hospital in July of 2016. The investigation and arrests involved hospital police, the Fresno County Sheriff’s Department and other members of the Central Valley Regional Internet Crimes Against Children Taskforce, officials said.

The suspects were all booked into the Fresno County Jail.

No other information was immediately available.