Investigators in Arizona have questioned two "persons of interest" in the most devastating wildfire to ever blaze through the state, which they believe was caused by a single campfire in the Bear Wallow wilderness, reports the AP. It's unclear whether those involved will face charges or have to pay restitution, and officials thus far aren't calling the pair suspects. Click through the gallery for scenes of the wildfires, which have now consumed almost 480,000 acres in Arizona and New Mexico. (More Arizona stories.)