Louisville, Kentucky (CNN) — The power had just gone off and the ground was shaking at Grade A Auto Parts when the owner received a panicked video call from his chief financial officer.

On his screen, CEO Sean Garber watched a “huge fireball” engulf the Louisville, Kentucky, auto-part and recycling facility he has owned for decades as his colleague described a blast followed by “a continuation of explosions.”

CNN’s Danya Gainor, Amanda Musa, Emma Tucker, Leigh Waldman and Matthew Rehbein contributed to this report.

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