A declassified report has finally revealed the causes of the mysterious Havana syndrome.

The House Permanent Select Committee on Intelligence said in the 2023 report by the Office of the Director of National Intelligence, which was declassified on Thursday (December 5), that it "appears increasingly likely that a foreign adversary is behind some" cases of Havana Syndrome, the common name for "anomalous health incidents" suffered by U.S. national security officials, CBS News reports. The committee concluded that an assessment, which deemed it "very unlikely" that the diseases was spread by a foreign adversary, but claimed some intelligence agencies only had "low" or "moderate" confidence in that conclusion, "lacked analytic integrity and was highly irregular in its formulation."

Thursday's report also accused the intelligence community of interfering while the House Intelligence Committee conducted its ongoing investigation.

"Sadly, the [intelligence community] has actively attempted to impede our investigation, but we have nonetheless been able to gather significant evidence, and I have reason to believe that its claims of environmental or social factors explaining AHIs are false," said Rep. Rick Crawford, the chairman of the Subcommittee on the Central Intelligence Agency, who led the investigation, via CBS News.

A total of 334 American military officials were reported to have qualified for anomalous health incidents as of January 2024, the report stated. Scientists claimed the symptoms could have been caused by exposure to microwave or acoustic ultrasound beams in the report.

A bipartisan group of lawmakers sent a letter to President Joe Biden calling for "renewed assessment by the U.S. government" into "anomalous health incidents" in March following a 60 Minutes feature on the illnesses. House officials called for the Intelligence Community to release a new report on the incidents after the report was declassified on Thursday.

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