An employee at the USA consulate in Guangzhou and his family have reportedly been evacuated from China upon suffering neurological symptoms after hearing odd sounds. "We will maintain communication with the United States on this". A spokesperson for the State Department confirmed to The Associated Press that "a number of individuals" had been brought to the US for further testing.
"US medical professionals will continue to conduct full evaluations to determine the cause of the reported symptoms and whether the findings are consistent with those noted in previously affected government personnel or possibly completely unrelated", State Department spokeswoman Heather Nauert said in a statement.
Last year, 24 USA government employees and family members in Cuba displayed the symptoms, which were similar to those related to concussions and mild traumatic brain injury, according to the State Department.
A USA official said the evacuated Americans are being brought for testing to the University of Pennsylvania.
Mark Lenzi, a Foreign Service officer in the US Consulate in Guangzhou, told the Washington Post he started hearing noises in April 2017 that sounded like "marbles bouncing and hitting a floor, then rolling on an incline with a static sound".
The China incidents affect one of the most important of the seven United States diplomatic outposts in the country.
A state department release on Tuesday made no reference to the possibility of a deliberate attack in China.
In testimony before the Senate Foreign Relations Committee last month, US Secretary of State Mike Pompeo said China had "said all the right things and have demonstrated their willingness to help us identify the vector which led to this medical incident". In response, it downsized the US diplomatic staff in Havana and prohibited families from joining the diplomats who stayed. The United States has also not yet revealed how many people are being evacuated.
A paramilitary police officer guards the entrance to the USA embassy in Beijing on April 5.
One US official was diagnosed with mild brain trauma, the same injury that affected the Cuban embassy staff.
Other researchers subsequently criticized the methods used in the study, saying that the neuropsychological evidence that the article presented was flimsy.
Two weeks ago, the agency said one government employee in Guangzhou experienced "vague, but abnormal, sensations of sound and pressure", similar to the unexplained incidents - sometimes described as "sonic attacks" - that recently sickened staffers in Cuba.