(CNN) — Nineteen people are dead or missing after a massive blast obliterated a building at a Tennessee explosives facility on Friday, authorities said.

The blast occurred at Accurate Energetic Systems, LLC, on Friday morning.

“I can tell you that we’re missing 19 souls,” Humphreys County Sheriff Chris Davis said at a news conference Friday afternoon.

Davis described the aftermath of the explosion as “the most devastating scene that I’ve seen in my career.”

The sheriff said there are fatalities but he did not want to declare a death toll yet.

“I always wish for the best,” Davis said. “Is there a possibility that somebody might be injured somewhere, or somebody that we don’t know about? Yes.”

The facility, Davis added, was completely destroyed in the blast. “There’s nothing to descri

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