Site security officers, fire and rescue crews and local and federal law enforcement personnel went to the Nevada National Security Site, 75 miles northwest of Las Vegas, late Tuesday afternoon to investigate the object, the details of which were not disclosed, the Las Vegas Sun reported.
Kelly Snyder, the site's spokeswoman, said the object was discovered outside the security fence surrounding the 100,000-square-foot underground device assembly facility that was built in the 1980s to support subterranean nuclear testing.
Officials called the situation a "security incident," but also said the item was "non-threatening" and that all site employees were accounted for and there were no injuries.
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