There are no survivors from a factory explosion that ripped through a munitions plant in rural Tennessee, police have confirmed.

Eighteen people were missing after the huge blast, but Humphreys County Sheriff Chris Davis has now confirmed all died.

It happened on Friday morning at Accurate Energetic Systems , a company which supplies and researches explosives for the military.

Image: Officers guard the gate at Accurate Energetic Systems military explosives plant. Pic: Reuters

It scattered debris over at least half a mile (800m) and was felt by residents more than 15 miles (24km) away, Mr Davis said.

Aerial footage showed the company's hilltop location smouldering and obliterated by smoke for much of Friday, with just a mass of twisted metal, burned-out shells of cars, and an arr

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