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CIA Director William Burns delivered a secret warning to Russian intelligence services that they will face xe2x80x9cconsequencesxe2x80x9d if they are responsible for the mysterious health incidents known as xe2x80x9cHavana Syndromexe2x80x9d that have afflicted U.S. spies, diplomats, FBI agents and others spies around the world, three sources familiar with the matter said.
The warning was firstxc2xa0reportedxc2xa0by The Washington Post.
Burns raised the issue during a visit to Moscow this month, the sources said, while he was speaking to top officials of Russiaxe2x80x99s Federal Security Service, the FSB, and its Foreign Intelligence Service, the SVR.xc2xa0
Victims suffering fromxc2xa0Havana Syndromexc2xa0have reported hearing a loud sound and feeling pressure in their heads and then experiencing dizziness, unsteady gait and visual disturbances. Many say they have suffered long-standing debilitating effects.