A source familiar with these incidents says officials are investigating whether the diplomats were targets of a type of sonic attack directed at their homes, which were provided by the Cuban government. Mystery shrouds 'incidents' in Cuba involving US embassy personnel 
 
 Canadian diplomat in Cuba also suffered hearing loss 
 
 Hearing loss of US diplomats in Cuba blamed on covert device 
 
 Tillerson says diplomats in Havana suffered 'health attacks' 
 
 Nauert said the "first reported activity" had taken place in late December 2016. "Like any top-notch academic medical center in the nation, the University of Miami is often consulted regarding complex health care issues or emerging diseases. In a statement received by CBS News from the University of Miami Health System, they confirmed its physicians were "consulted" by State on its diplomats in Cuba. In May 2017, the State Department asked two Cuban officials working at the embassy in the United States to depart the country. "We hold the Cuban authorities responsible for finding out who is carrying out these health attacks on not just our diplomats but, as you've seen now, there are other cases with other diplomats involved," Secretary of State Rex Tillerson told reporters earlier this month. Regardless of the circumstances of providing medical care, maintaining patient privacy stands as a top priority for the University." There have been no reports of other embassies experiencing this, a senior State Department official said.
– American diplomats treated after a series of unexplained incidents in Havana had health problems including mild traumatic brain injury and central nervous system damage, according to medical records seen by CBS News. The diplomats, some of whom ended up having to leave Cuba, were treated by an American doctor after complaining of symptoms including hearing loss, headaches, and loss of balance. Sources say the diplomats, who lived in homes provided by the Cuban government, began experiencing symptoms in the fall of 2016 after their residences were targeted with what American officials believe was some kind of advanced sonic weapon. Officials say at least 10 diplomats and embassy employees were affected. State Department spokeswoman Heather Nauert said Wednesday that the "unprecedented" incidents "caused a variety of physical symptoms." She said some diplomats were treated in Miami and others were treated by American medical personnel who traveled to Cuba. "What has happened there is of great concern to the US government," she said. "Let me just reassure you that this is a matter that we take very seriously." Officials tell ABC News that the FBI and the State Department are investigating in Cuba. Cuban authorities are assisting the investigation, the officials say. (At least one Canadian diplomat was also targeted.)