Video: What made this American house of a White Family blow up like this?

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[This is a hell of an explosion and 3 houses were wiped out. I'm guessing this is GAS. But there is also talk of ammunition stored in the house and maybe a mine below it. But all I can think of is that maybe gas came out of the mine? This is pretty wild. The people killed were White. Jan]

Here’s the video: https://www.youtube.com/watch?v=9hvSbZjwOa8