According to the Times, there are about 170 American diplomats or employees in Guangzhou, as well as their family members, and a senior American official said a sizable number had undergone or would soon undergo testing by the State Department doctors who arrived May 31.
Employees at the American consulate in Guanzhou, China have fallen ill and exhibited symptoms similar to those displayed by US workers in Cuba, who in 2016 also heard unusual noises.
On Wednesday, State Department spokesperson Heather Nauert said the employees were sent to the US for a "further evaluation and a comprehensive assessment of their symptoms and findings".
The U.S. State Department dispatched a medical team to China as reports emerged that diplomats there appeared to be suffering from a mystery ailment that drew comparisons to health issues detected among Americans stationed in Cuba.
On May 23, the State Department issued a health alert after a US government employee reported "subtle and vague, but abnormal, sensations of sound and pressure".
Secretary of State Mike Pompeo confirmed the similarities between the cases to the House Foreign Affairs Committee last month.
A State Department official told CNN at the time that it was "currently reviewing the incident in China and determining how best to proceed".
The US state department said several government employees working in Guangzhou had been sent back to the US to be evaluated.
Earlier this month, the State Department issued a health warning to its staff saying an employee in China had reported "subtle and vague, but abnormal, sensations of sound and pressure". The U.S. government has deemed those incidents "specific attacks" on American workers but hasn't publicly identified a cause or culprit. The report said officials are expecting more United States personnel to be evacuated.
Vehicles pass by high-rise apartment buildings in The Canton Place where U.S. government workers experienced unexplained health issues in Guangzhou, southern China's Guangdong province, Thursday, June 7, 2018. The Times reported that the illnesses frayed some diplomatic relations with Cuba, but the recent reports have led others to consider if another country may be involved, including China or Russian Federation.
In 2017, 24 United States diplomats and their family members in Cuba fell victim to mysterious "attacks" that left them with injuries resembling brain trauma. 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.