Pendleton, OR -

A fire investigation is getting underway in the Eastern Oregon city of Pendleton, where five people died and two were seriously injured when a two-story rented house burned.

Police Chief Stuart Roberts says there was no initial indication of foul play as authorities got into the residence after daybreak Monday. But he says no cause has been ruled out.

State, local and federal investigators are at the house. Roberts says the home appears to date to the early 20th century. He says it burned rapidly and thoroughly Sunday, and it was too dangerous to examine in the dark.

Roberts says the survivors are not able to be interviewed, and authorities won't begin notifying relatives of the dead until they get positive identifications from the medical examiner's office. Three children died.