A Tennessee explosives manufacturing plant blew up Friday morning with "several people unaccounted for” and "some that are deceased," authorities said.

Humphreys County Sheriff Chris Davis called the explosion at Accurate Energetic Systems a "very devastating blast" that "encompassed one whole building."

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"We do have several people at this time that’s unaccounted for," Sheriff Davis told reporters. "We are trying to be mindful of families and that situation. We do have some folks. We can confirm that we do have some that are deceased."

The plant, where the 7:45 a.m. CDT explosion happened, sits on the line of Humphreys and Hickman Counties. The scene is about 60 miles southwest of downtown Nashville.

"We can c

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