The Pentagon has tested a device that investigators believe may be linked to the condition commonly referred to as Havana Syndrome, CNN has reported.
The Defense Department has been testing the device, which was bought during an undercover operation by the Department of Homeland Security, for over a year, the network reported on Monday, citing four anonymous sources briefed on the subject.
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Two unnamed sources said officials in the previous administration, under former President Joe Biden, had purchased the device for an eight-figure sum. The funding was provided by the Department of Defense, according to the report.
Speculation had swirled some form of directed-energy weapon could have been behind the baffling illness, and that Russian technology could be behind the symptoms. Moscow has denied any involvement.
The device acquired by Homeland Security Investigations—part of DHS—produces pulsed radio waves, one source told CNN. It contains Russian components but is not entirely Russian-made, they added.