McEWEN, Tenn. - Authorities said Saturday that the explosion at an explosives plant in rural Tennessee, which leveled the facility and was felt miles away, left no survivors.

What they're saying:

Humphreys County Sheriff Chris Davis said during a news conference that officials were working on the assumption that all of the people at the site were dead. The total number of people who died was unclear, as was the cause of the blast.

Davis had said earlier there were 18 people missing.

RELATED: "Devastating blast" rips through Tennessee explosives plant; 19 people missing and feared dead

"We’ve recovered no survivors," Davis said.

The backstory:

The explosion Friday morning at Accurate Energetic Systems , which supplies and researches explosives for the military, scattered debri

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