Oak Ridge National Laboratory was locked down for more than four hours on Sunday as officials investigated a security-related concern that turned out to be unsubstantiated, a spokesman said.
Officials took the proper precautions and stopped people from entering or leaving the lab during the lockdown, which lasted from about 8:40 a.m. to about 1:15 p.m. Sunday, ORNL Communications Director David Keim said.
“When we investigated, we found that the concern was unsubstantiated,” Keim said.
He said the security concern was reported by a U.S. Department of Energy contractor employee at ORNL. Keim said he couldn’t give more information on the nature of the report since the concern wasn’t substantiated.



