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From link:
UPDATE 3: The man reportedly told bomb squad that he sustained “radio frequency burns” while working on a “quantum physics generator” in his garage, according to Battalion Chief Steve Martin, the Columbus Division of Fire spokesman, speaking to the Columbus Dispatch.
“We have no reason to believe that he was trying to make anything that would do anyone any harm,” Martin added.
UPDATE 2: Haley Nelson of WSYX-TV reports that a resident was working on a “quantum physics generator” at the home and was burned. The type of burns caused confusion among first responders, prompting a precautionary evacuation of about 40 homes.
Teams have not picked up any radiation at this time, but are continuing their investigation.