(CNN) — Eighteen people are dead or missing after a massive blast obliterated a building at a Tennessee explosives facility on Friday, authorities said — a “mass detonation” so significant that it rattled homes miles away.

The early-morning explosion at Accurate Energetic Systems, which manufactures military and demolition explosives, left charred debris and mangled vehicles across a vast area. The blast was felt as far as 15 miles away and scattered debris over half a square mile.

“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.”

Officials previously said they were “missing 19 souls,” but later clarified one person who was initially believed to be at the plant was located at their hom

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