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This image taken from surveillance video provided by Metro Nashville PD shows a recreational vehicle that was involved in a blast on Friday in Nashville, Tenn. (Metro Nashville PD via AP)

Possible Remains Found, but Motive Still Eludes in Nashville RV Explosion

Authorities said it was uncertain whether anyone was inside the recreational vehicle when it exploded, but police reported hours later that investigators had found possible human remains near the site. As for motive, authorities were still trying to find one.