The US believes several State Department employees at the US embassy in Havana were subjected to an “acoustic attack” using sonic devices that left at least two with such serious health problems they needed to be brought back to the US for treatment, several senior State Department officials told CNN. One official said the employees could have suffered

permanent hearing loss as a result. The employees affected were not at the same place at the same time, but suffered a variety of physical symptoms since late 2016 which resembled concussions. The State Department raised the incidents with the Cuban government over the course of several months and sent medical personnel to Havana, but have not been able to determine exactly what happened. READ MORE