An explosion at a Tennessee military munitions plant has left 19 people missing and feared dead, authorities said.

The blast occurred on Friday at Accurate Energetic Systems, a manufacturer in rural Tennessee, a state in the southern United States. People reported hearing and feeling the explosion miles away.

Humphreys County Sheriff Chris Davis said it was one of the most devastating scenes he’s ever seen. He did not specify how many people were killed, but referred to the 19 missing as “souls” and said officials were still speaking to family members.

The company’s website says it makes and tests explosives at an eight-building facility that sprawls across wooded hills in the Bucksnort area, about 97 kilometres (60 miles) southwest of Nashville.

The cause of the explosion, which Davis

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