NEW YORK — The Trump administration is considering closing down the recently reopened U.S. Embassy in Havana after a string of unexplained incidents harming the health of American diplomats in Cuba, Secretary of State Rex Tillerson said Sunday.

Tillerson’s comments were the strongest indication to date that the United States might mount a major diplomatic response, potentially jeopardizing the historic restart of relations between the U.S. and Cuba. The two former foes reopened embassies in Washington and Havana in 2015 after a half-century of estrangement.

“We have it under evaluation,” Tillerson said of a possible embassy closure. “It’s a very serious issue with respect to the harm that certain individuals have suffered. We’ve brought some of those people home. It’s under review.”

Of the 21 medically confirmed U.S. victims – diplomats and their families – some have permanent hearing loss or concussions, while others suffered nausea, headaches and ear-ringing. Some are struggling with concentration or common word recall.

Some victims felt vibrations or heard loud sounds mysteriously audible in only parts of rooms, leading investigators to consider a potential “sonic attack.” Others heard nothing but later developed symptoms.

Tillerson once called the events “health attacks,” but the State Department has since used the term “incidents” while emphasizing the U.S. still doesn’t know what has occurred. Cuba has denied any involvement or responsibility but stressed it’s eager to help the U.S. resolve the matter.

The U.S. has said the tally of Americans affected could grow as more cases are potentially detected. The last reported incident was on Aug. 21, according to a U.S. official briefed on the matter.

A decision to shutter the embassy, even temporarily, would deal a demoralizing blow to the delicate detente that President Obama and Cuban leader Raul Castro announced in late 2014. The next year, embassies were reopened and restrictions on travel and commerce eased – signs of a warming relationship that displeased some hard-liners in Cuba’s government. President Trump has reversed some of the changes, but left many in place.

Tillerson spoke on CBS’ “Face the Nation” as world leaders and top diplomats descended on New York for annual U.N. General Assembly meetings.


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