Wasco County Sheriff's Office says Substation Fire is 'incendiary in nature'

The Substation Fire burns through brush Wednesday, July 18, 2018. The fire was more than 50,000 acres by the end of the day. (Photo: Chopper 2/KATU)

THE DALLES, Ore. – The Wasco County Sheriff’s Office said the Substation Fire is “incendiary in nature” Thursday morning.

While the official cause is still under investigation, incendiary fires are typically caused by an arsonist.

But still, the sheriff’s office urges the public not to speculate on the cause of the fire.

The Wasco County Sheriff’s Office, Oregon State Police, Oregon State Fire Marshal, the Bureau of Land Management and the United States Forest Service are investigating the cause.

The Oregon State Fire Marshal’s Office could not comment on the cause of the fire at a news conference Thursday morning. They said the investigation was in the hands of local law enforcement.

Oregon Gov. Kate Brown said state agencies will assist the Wasco County Sheriff’s Office with the investigation.

Oregon State Police established a tip-line Thursday. Anyone with information on the cause should call 800-452-7888.

The Substation Fire started Tuesday afternoon. It has since grown to more than 50,000 acres. It has destroyed several structures and killed one person.

READ MORE | Crews hold Substation Fire to just over 50,000 acres overnight, no new structures burned

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