PENDLETON -- Authorities have released the identity of another victim killed in a charter bus crash in rural eastern Oregon last weekend.

Oregon State Police on Saturday identified the eighth fatality as Seokmin Moon, a 55-year-old man from Maple Ridge, British Columbia. They also released the name of his wife, 53-year-old Choonja Moon, who is being treated at Harborview Medical Center in Seattle.

Nine people were killed and 38 injured when the tour bus crashed through a guardrail and 200 feet down an embankment along Interstate 84 east of Pendleton last Sunday. The bus was returning to Vancouver, British Columbia, after a nine-day trip. Authorities are withholding the ID of the ninth person killed pending notification of next-of-kin.

Investigators have yet to say what caused the crash, which was Oregon's deadliest since 1971.