Western intelligence agencies and Microsoft say a Chinese state-sponsored hacking group has spied on a wide range of critical U.S. infrastructure institutions.
Microsoft said in a report that the espionage targeted the island of Guam, home to strategic U.s. military bases. China said the hacking allegations were a "mass disinformation campaign" by the "Five Eyes" countries, referring to the United States, Canada, New Zealand, Australia and the United Kingdom. It was not immediately clear how many organizations were affected, but the US National Security Agency said it was working with partners including Canada.