A new assessment by U.S. intelligence agencies has revealed disagreement over the cause of the mysterious health incidents known as “Havana syndrome,” which have impacted U.S. diplomats, intelligence officers, and military personnel worldwide. 

The report, released earlier this week disclosed that two of the seven spy agencies involved in the assessment now believe a foreign actor may have developed or deployed a weapon responsible for the mysterious health incidents. The identities of the intelligence services that had revised their assessment of the injuries were not disclosed. 

The two agencies suggest that there is “roughly even chance” that a foreign actor could have developed or even used a directed energy weapon or similar device responsible for a small number of cases. These assessments were based on reports of advancements in directed energy weapon technology by foreign governments. 

Despite these findings, the agencies acknowledged that their judgments were made with “low confidence” and lacked direct evidence. 

The term “Havana syndrome” emerged in 2016 after U.S. diplomats stationed in Cuba reported unexplained symptoms, including vertigo, severe headaches, hearing loss, and cognitive issues. Since then, similar incidents have been reported by hundreds of U.S. personnel in multiple countries, with some cases requiring medical evacuation and long-term care.

The majority of the intelligence agencies involved in the assessment determined that the symptoms are not likely linked to foreign adversaries, citing a lack of compelling evidence despite years of investigation. 

The assessment has reignited debate among officials, lawmakers, and affected individuals. Victims of Havana syndrome, many of whom believe foreign adversaries like Russia are responsible, have criticized the intelligence community for minimizing their experiences. 

Republican lawmakers, including Representative Rick Crawford of Arkansas, have accused the Biden administration of withholding evidence of foreign involvement. A report by the House Intelligence Committee recently concluded that it is “increasingly likely” a foreign power was behind at least some of the cases.

The White House stressed the need for further investigation. Sean Savett, a spokesperson for the National Security Council, emphasized that ongoing research and support for affected personnel remain priorities, stating: “It is vital that the U.S. government continue critical research, investigate credible incidents, and strengthen efforts to provide care and clinical follow-up for those impacted.”