Sheriff Shane Nelson identified the victims as Steven Todd Preston, 51, and Austin Tyler Lee, 22.
Sheriff’s investigators are being assisted by the Oregon State Police Arson and Explosives Section, as well as the federal Bureau of Alcohol, Tobacco, Firearms and Explosives.
The sheriff also said a film crew was present at the time of the explosion and was capturing video of the tank destroyer firing rounds, which could prove crucial as authorities work to learn what took place and why.
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