A search is underway after a powerful explosion ripped through an explosives manufacturing plant in rural Tennessee on Friday.

The blast sent plumes of smoke into the air and shook homes miles away.

Here is what to know as first responders search the rubble for missing people and try to determine what caused the explosion.

Search ongoing

There are casualties and injuries related to the explosion, but the Tennessee Emergency Management Agency isn’t sharing any numbers because the Department of Health hasn’t confirmed them, spokesperson Kristin Coulter said by telephone.

Humphreys County Sheriff Chris Davis said at a press conference that there were “several people at this time unaccounted for."

"We are trying to be mindful of families and that situation," Davis said.

It is currentl

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