Oct. 10 (UPI) — Multiple people were killed and several others are missing after an explosives plant blast in Bucksnort, Tenn., Thursday.

Officials haven’t yet released any names or numbers of the victims. About 80 people work at Accurate Energetic Systems, but it isn’t yet clear how many were there at the time of the explosion.

Humphreys County Sheriff Chris Davis said the explosion was a “very devastating blast” that “encompassed one whole building,” 10 News reported.

The explosion happened at 7:45 a.m. CDT. The plant is on the county line between Hickman and Humphreys counties, southwest of Nashville near I-40.

Three people with minor injuries have been treated at TriStar medical in Dickson, Tenn., CNN reported. Two of them have been released, and one is still being treated in an emergency room.

Davis said the scene is secured and that people nearby might hear smaller explosions throughout the day. The Tennessee Bureau of Investigation, Department of Homeland Security, Bureau of Alcohol Tobacco, Firearms and Explosives and others came to help in the investigation.

Before Davis’ remarks, officials with the Humphreys County Emergency Management Agency said at least 19 people are missing, one person possibly died, and several others were in the hospital.

Accurate Energetic Systems, founded in 1980, said the company is “dedicated to the development, manufacture, handling, and storage of high-quality energetic products utilized in both defense and commercial markets.”

Hickman County Mayor Jim Bates said, “It’s pretty devastating to see this.”

“It’s going to be an investigation that’s probably going to go on for days,” CNN reported Bates said. “This facility, they do manufacture, not only military, but demolition explosives for road work and things like that.”

State Sen. Kerry Roberts told CNN that the company is a beloved local employer.

“It is a well-loved company in the area,” Roberts said. “So this is going to have a devastating impact on quite a few families … it is heartbreaking.”

Local residents said they felt the blast.

“I thought the house had collapsed with me inside of it,” Gentry Stover said. “I live very close to Accurate, and I realized about 30 seconds after I woke up that it had to have been that.”

Lobelville’s Cody Warren, who lives 21 miles away from the facility, said the explosion woke him up, and he thought lightning had struck his house, CNN reported.

The U.S. Department of Defense awarded the company a contract for nearly $120 million for TNT last month.