The CIA has determined that most cases of Havana syndrome were not caused by a sustained global campaign by a foreign power against US diplomats and spies, according to a new report.
The majority of 1,000 cases of the mysterious ailment reviewed by US officials show it is unlikely to have been caused by Russia or another foreign adversary, CIA officials told the New York Times about a study’s preliminary findings.
The officials said the symptoms can be explained by environmental causes, undiagnosed medical conditions or stress.
But the CIA is still continuing to investigate some two dozen unexplained cases that may provide clues as to whether a foreign power is responsible for the condition, which has affected US officials and relatives overseas, including in Vienna, Paris, Geneva and Havana, the paper reported, citing agency sources.
In addition to those two dozen cases, a significant number of others are still unexplained, the Times cited a CIA official as saying.