American officials in Havana hit by acoustic attack, says State DepartmentStaff Writer | August 10, 2017
Two Cuban diplomats in the United States were expelled in May after suspicions that American officials in Havana were hit with a silent "acoustic attack" that induced hearing loss, State Department officials said.
Relations "It can be quite serious"
"We don't have any definitive answers about the source or the cause of what we consider to be incidents.
State Department officials told CNN that one American employee in Havana may have permanent hearing loss from the alleged attacks in 2016. Several others experienced physical symptoms that resembled concussions while in Cuba.
The cause of the symptoms and method of attack is unknown.
"It can be quite serious," a State Department official said. "We have worked with the Cubans to try and find out what is going on. They insist they don't know, but it has been very worrying and troublesome." ■