A mysterious illness that has affected US diplomats in recent years has been linked to a Russian intelligence unit.
Personnel stationed around the globe with "Havana Syndrome" have reported unexplained symptoms such as dizziness.
They may have been targeted by Russian sonic weaponry, according to a joint investigation by The Insider, Der Spiegel and CBS’s 60 Minutes.
Moscow has denied the accusations.
US officials previously said it was unlikely a foreign power was to blame.
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