http://www.bbc.com/news/world-us-canada-44223523
>The US state department has urged its staff in China to alert them to any abnormal hearing or vision issues after one employee reported mystery symptoms.
>The person experienced "subtle and vague, but abnormal, sensations of sound and pressure", a statement said.
>Secretary of State Mike Pompeo said the incident was "medically similar" to suspected sonic attacks on diplomatic staff in Cuba.