China accused the United States and its allies of waging a "disinformation campaign" Thursday, after Washington, its Western partners and Microsoft said state-sponsored Chinese hackers had infiltrated critical US infrastructure networks.
"This is an extremely unprofessional report with a missing chain of evidence, this is just scissors-and-paste work," foreign ministry spokeswoman Mao Ning said.
The allegations were "a collective disinformation campaign of the Five Eyes coalition countries", she said.
In a report Wednesday, Microsoft highlighted Guam, a US territory in the Pacific Ocean with a vital military outpost, as one of the targets of the allegedly Chinese state-backed hackers.
But, it said, "malicious" activity had also been detected elsewhere in the United States.
The stealthy attack -- carried out by a China-sponsored actor dubbed "Volt Typhoon" since mid-2021 -- enabled long-term espionage and was likely aimed at hampering the United States in the event of a conflict, it said.
The claims were echoed by the United States and its allies in the Five Eyes security alliance -- Australia, Canada, New Zealand and the United Kingdom -- accusations Beijing denied on Thursday.
The United States, Mao said, "was expanding new channels for disseminating disinformation".
"But no change in tactics can alter the fact that the US is a hacker empire," she said.
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