The US embassy in China has issued a health alert to Americans in country after a USGOV employee assigned to the southern city of Guangzhou experienced an "abnormal" sound resulting in mild traumatic brain injury.

Subscribers are reminded that last year in Cuba, 24 US and 10 Canadian diplomats, as well as their family members, fell victim to mysterious "acoustic attacks" resulting in injuries resembling brain trauma.The victims associated the onset of their symptoms with "unusual sounds or auditory sensations." .

In the previous incidents, senior USGOV officials have speculated the victims had been targeted by some form of "acoustic weapon."

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Location: Guangzhou

Event: A U.S. government employee in China recently reported subtle and vague, but abnormal, sensations of sound and pressure. The U.S. government is taking these reports seriously and has informed its official staff in China of this event. We do not currently know what caused the reported symptoms and we are not aware of any similar situations in China, either inside or outside of the diplomatic community.

Action to Take:

• If you have concerns about any symptoms or medical problems that developed during or after a stay in China, consult a medical professional.
  
  
• While in China, if you experience any unusual acute auditory or sensory phenomena accompanied by unusual sounds or piercing noises, do not attempt to locate their source. Instead, move to a location where the sounds are not present.