PENDLETON, Ore. (AP) -- Authorities say three victims of a Pendleton house fire last month were children of one of the survivors.

Police Chief Stuart Robert told the East Oregonian that autopsies showed the children and two adults died of smoke inhalation Sept. 22 in a fast-moving fire

The East Oregonian reports the children were 5-year-old Evan Williams, 2-year-old Rowan Harvey and 5-month-old Annabelle Williams.

Background: 5 die, including 3 kids, in Pendleton house fire

Their mother, 27-year-old Kay Williams, was hospitalized along with 49-year-old David Eickstaedt, both tenants at the rental house.

Roberts said they jumped out a window.

They were released from the hospital last week.

Roberts said the adults who died were guests: 29-year-old Kristopher Lee Morton and 46-year-old Treasa Marie Philpott.

Authorities haven't pinpointed a cause but ruled out arson involving accelerants or a drug lab accident.

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