Anne Neuberger, Deputy National Security Advisor for Cyber and Emerging Technology, speaks during a press briefing at the White House, March 21, 2022, in Washington. (AP)
The FBI has not publicly identified any of the victims, but officials believe senior U.S. government officials and prominent political figures are among the victims whose communications were accessed.
Neuberger said officials did not yet have a precise sense of how many Americans overall were targeted by Salt Typhoon, in part because the hackers were careful about their methods, but she said that a "large number" of the victims were in Washington, D.C., and Virginia.
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U.S. and Chinese flags are set up before a meeting between U.S. Treasury Secretary Janet Yellen and Chinese Vice Premier He Lifeng at the Diaoyutai State Guesthouse in Beijing, China, Saturday, July 8, 2023. (Mark Schiefelbein/Pool via REUTERS)
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She also said, without offering details, that the government was planning further action in the coming weeks in response to the hacking campaign, though she did not say what they were.
"We know that voluntary cybersecurity practices are inadequate to protect against China, Russia and Iran hacking of our critical infrastructure," she said.
The Chinese government has denied responsibility for the hacking campaign.
The Associated Press contributed to this report.
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