Havana syndrome linked to Russian intelligence, media investigation finds. Starting in 2016, American and Canadian diplomats reported being hit by health incidents.

According to an investigation carried out by three media outlets, a unit of the Russian military intelligence service was behind it. Moscow on Monday rejected the investigation as “unfounded” "This topic has been hyped in the press for several years now. And from the beginning, it has often been associated with Russia," Kremlin spokesman Dmitry Peskov said.