MCEWEN, Tenn. -- Multiple people are dead following a "devastating blast" at an explosives manufacturing plant in Tennessee on Friday, according to authorities.

The explosion occurred Friday morning at Accurate Energetic Systems in McEwen, located about 50 miles west of Nashville.

Humphreys County Sheriff Chris Davis confirmed to reporters there are "some" fatalities, though he did not give specific numbers.

During a news conference later Friday afternoon, the sheriff said 19 people were missing.

"We got a very big investigation," Davis said during a press briefing. "This is not going to be something that we're going to be like a car wreck or something like that, that we're just going to clean up the debris and leave. We're going to probably be here for a few days."

"We're trying to

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