The United States would be “putting people intentionally in harm’s way” if it sent diplomats back to Cuba, Secretary of State Rex Tillerson says in an Associated Press interview , even as a new FBI report casts doubt on the initial theory that Americans there have been hit by “sonic attacks.”

Following months of investigation and four FBI trips to Havana, an interim report from the bureau’s Operational Technology Division says the probe has uncovered no evidence that sound waves could have damaged the Americans’ health, the AP has learned. Francisco Palmieri, acting Assistant Secretary of State for Western Hemisphere Affairs, said the Cuban government was responsible for the security of US diplomatic personnel on the island “and they have failed to live up to that responsibility.”

Asked whether it was possible that the Cuban government would have been unaware of any attacks, he said: “I find it very difficult to believe that. Cuba is a security state, the Cuban government in general has a very tight lid on anything and everything that happens in that country.”

Cuban investigators say US allegations of sonic attack are ‘science fiction’

The Cuban government has accused the Trump administration of slander for saying Havana was holding back information.
An anonymous senior State Department official says that United States Secretary of State Rex Tillerson decided to convene a special-panel Accountability Review Board to further investigate the "attacks" at the U.S. embassy in Havana.