CHARLOTTESVILLE, Va. (AP) — Authorities have ruled the death of a University of Virginia student a homicide.

The Albemarle County Police Department released the cause and manner of death for 18-year-old Hannah Graham on Tuesday.

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According to information from the Virginia medical examiner’s office, Graham’s death was “homicidal violence” but the exact cause was unknown. A final autopsy report has not been issued.

In a statement, county police and prosecutors said they would not be answering any further questions or providing additional information. Both said they “remain committed to the investigation.”

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Graham’s remains were found Oct. 18 near Charlottesville after a monthlong search. She disappeared Sept. 13 after a night out with friends.

The man Graham was last seen with, 32-year-old Jesse Leroy Matthew Jr., is charged with abduction with intent to defile Graham.

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