Humphreys County Sheriff Chris Davis said during a Saturday press conference there are believed to be “no survivors” from Friday’s powerful explosion at the Accurate Energetic Systems facility in Tennessee. He did not confirm how many fatalities there were, but he previously said 18 people were missing on Friday.

Accurate Energetic Systems specializes in the “development, manufacture, handling, and storage of a diverse array of energetic products and explosives for military, aerospace, and commercial demolition markets,” according to its website. The Associated Press reported that the company has sold to and had been awarded military contracts with the U.S. Army and Navy.

The powerful explosion at the facility occurred early Friday around 7:45 am local time, and was felt more than 15 miles away.