The person who is making explosive devices and has left them at three Austin doorsteps is constructing them using common household items that can be easily purchased at hardware stores, potentially making efforts to identify the perpetrator more difficult, law enforcement officials said Thursday.
Authorities are trying to identify all the materials used to make the bombs, which have killed two people and left an elderly woman seriously wounded. However, they do not think the bombs were built from specialized equipment that would enable them to more easily identify who would have access to such items.
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Source: Pittsburgh Post-Gazette