China crippled CIA operations, killing or imprisoning up to 20 sources – Business Insider

One was shot and killed in front of a government building in China, three officials told the Times, saying that was designed as a message to others about working with Washington.

https://www.businessinsider.com/r-china-killed-cia-sources-hobbled-us-spying-from-2010-to-2012-nyt-2017-5