London Daily

Focus on the big picture.
Wednesday, Sep 16, 2026

‘Havana syndrome’ unlikely caused by hostile foreign power, CIA says

‘Havana syndrome’ unlikely caused by hostile foreign power, CIA says

Investigation finds majority of cases probably linked to pre-existing medical conditions, environmental factors or stress
An initial CIA investigation into the mysterious set of symptoms known as Havana syndrome has found that it is unlikely to be the result of a worldwide campaign of attacks by a foreign power against US diplomats and spies.

However, two dozen cases, including some of those originally afflicted in Havana in 2016, could not be explained and would be further studied for evidence of a possible attack, according to a senior CIA official who briefed the US press.

“While we have reached some significant interim findings, we are not done,” the CIA director, Williams Burns, said in a statement. “We will continue the mission to investigate these incidents and provide access to world-class care for those who need it.”

Since the original outbreak of the symptoms, which include hearing strange sounds, dizziness, loss of balance, nausea and memory loss, more than 1,000 cases have been studied around the world.

The interim findings of a CIA investigation have found that the majority of cases could probably be attributed to a pre-existing medical condition, or environmental factors, or stress, the senior official said.

The defence department and an independent panel of experts are conducting their own investigations which have yet to publish reports.

The CIA finding suggests that after the initial cases were reported, hundreds of US embassy and intelligence agency employees started to wonder whether their symptoms could be related. Government agencies asked for anyone who thought they might be affected to file a report.

Marc Polymeropoulos, a former senior CIA official who has suffered severe symptoms since a visit to Moscow in 2017, said the interim findings did not resolve anything.

“They seem to have solved a problem they created with their mass data call – but core cases remain. So [are] we back to square one?” he asked on Twitter.

A Havana syndrome victims support group said in a statement: “The decision to release the report now and with this particular set of ‘findings’ seems a breach of faith, and an undermining of the intent of Congress and the president to stand with us and reach a government-wide consensus as to what is behind this,” a Havana syndrome victims group said in a statement.

“This report was neither cleared nor coordinated through the interagency and must stand as the assessment of one agency [CIA] alone.”

The secretary of state, Tony Blinken, said that investigations would continue.

“We are going to continue to do everything we can, with all the resources we can bring to bear, to understand, again, what happened, why, and who might be responsible,” Blinken said at a press conference in Berlin. “And we are leaving no stone unturned.”
Newsletter

Related Articles

0:00
0:00
Close
Police Tighten Public-Order Measures After Anti-Immigration Protests in Dover and Portsmouth
UK Ministers Pressed for Answers After US Diplomat Accused of Child Abuse Images Leaves Britain
Jaguar Land Rover Pursues NATO Defense Contracts for Defender Vehicles
British Service Member Dies in Road Accident While Deployed in Ukraine
George Osborne Calls for Britain to Rejoin EU Customs Union
Anthropic Chief Dario Amodei Urges Faster UK Action on Advanced AI Risks
UK State Pension Set for 3.9% Rise Under Triple Lock
UK Labour Market Cools as Payrolled Employment Continues to Decline
Reform UK’s £72 Million in Donations Faces Scrutiny Under Proposed Retrospective Funding Rules
UK Doctors Warn Expanded Pharmacy First Scheme Could Put Patients at Risk
British Airlines Cut Short-Haul Capacity as Jet Fuel Costs Rise
UK News Publishers Forecast 40% Search Traffic Drop as AI Overviews Expand
Axel Springer Wins Approval for £575 Million Daily Telegraph Acquisition
London Mayor Sadiq Khan Opposes Heathrow Third Runway Over Climate Targets
Scotland, Wales and Northern Ireland Leaders Hold Summit Seeking Greater Autonomy
UK Energy Price Cap Set to Rise to £1,723 in October
UK Treasury Warns Middle East Conflict Is Threatening Economic Growth
Labour Moves to Retrospectively Cap Overseas Political Donations After Reform UK Funding Surge
HMRC Warns Nearly Seven Million Adults Are Unclear About State Pension Entitlements
UK Parliament Passes Sovereign Grant Reform Before Conference Recess
British Rail Passengers Gain Automatic Right to Switch Operators During Disruptions
Burnham Hosts Downing Street Business Summit as UK Fiscal Pressure Builds
Labour Government Moves to Challenge £72 Million in Reform UK Crypto Donations
UK Advertising Industry Warns Wider Junk Food Rules Could Put £1 Billion in Media Spending at Risk
Cornwall Opens Devolution Talks With UK Government Over Transport and Local Services
UK Parliament Considers Sovereign Grant Reform Setting Royal Funding at £99.9 Million
Trades Union Congress Calls for Income-Based Energy Tariff Funded by Higher Bank Levy
UK Prime Minister Rejects Second Scottish Independence Referendum
House of Lords Begins Scrutiny of Bill to Lower UK Voting Age to 16
Anthropic Says Claude Was Exploited in Weapons-Related and State-Linked Cyber Activity
Institute of Directors Urges UK Government to Avoid Business Tax Increases in Autumn Budget
Rising Gilt Yields Cut UK Fiscal Headroom to About £13 Billion Ahead of Budget
UK Economy Grows 0.4% in July as Services and Technology Activity Strengthen
UK Government Promises Clearer Student Loan Guidance After Repayment Backlash
Charities Warn Unpaid Carers May Die Before Receiving Government Compensation
Dover Unrest Prompts Review of UK Counter-Extremism Strategy
Celtic Summit Leaders Reassert Right to Pursue Independence From UK
NHS Records Busiest Summer on Record Amid Severe Heatwaves
Harrods Faces Potential £150 Million Compensation Bill Over Al Fayed Abuse Claims
UK Parliament Opens Debate on Landmark Assisted Dying Legislation
Metropolitan Police Investigate Reform UK Over Alleged Foreign Electoral Donations
UK Economy Expands 0.4% in July as AI Investment Boosts Activity
Bank of England Signals Caution on Rates as Inflation Pressures Persist
Tesco Alerts Police After Scammers Use Its Branding in AI-Generated Fraud
Lindy Cameron Appointed First Female Permanent Under-Secretary at UK Foreign Office
UK Government to Rewrite Student Loan Guidance After Mis-Selling Criticism
Welsh First Minister Warns Andy Burnham Government to Respect Devolution
Trump’s Falkland Islands Remarks Trigger New Diplomatic Tension With Britain
Reform UK Receives Record £72 Million Donation From Cryptocurrency Billionaires
UK Bans Imports From Israeli West Bank Settlements and Sanctions Supporting Institutions
×