PHOENIX -- Police are investigating the discovery of explosives in the rubble of a burned structure that was among several buildings destroyed in two blazes that broke out in an industrial area of west Phoenix.
The fires started Thursday night as the city was hit with the first dust storm of the monsoon season that brought rain, lightning and winds gusting up to 50 mph.
It was not immediately clear what caused the fires, but authorities were looking into lightning as a factor.
No injuries were reported, but police said an investigative team later found dozens of tubes used for explosive devices at one of the sites with several of them containing live munitions.
The investigation was continuing while authorities worked to determine what the explosives were made of and who they belonged to.
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