McEWEN, Tenn. (AP) — A powerful explosion at a Tennessee munitions plant Friday left TK people dead and TK missing, authorities said, as smoke and secondary blasts forced rescuers to keep their distance from the burning site.

The blast occurred at Accurate Energetic Systems, according to the Hickman County Sheriff’s Office. The company’s website says it makes and tests explosives at the eight-building facility that sprawls across wooded hills near Bucksnort, a town about 60 miles (97 kilometers) southwest of Nashville.

The cause of the explosion was not immediately known. Video from the scene showed flames and heavy smoke rising from a debris field, and residents miles away reported feeling the explosion.

Emergency crews were initially unable to enter the plant because of continuing det

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