Beijing has previously denied responsibility for the breach.

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NATO was more circumspect in its message.

US and allies blame China for Microsoft Exchange cyberattacks

The announcements are part of a push from the US to build multilateral pressure on China.

Story byThomas Macaulay

Thomas is the managing editor of TNW.

He leads our coverage of European tech and oversees our talented team of writers.

Away from work, he e(show all)Thomas is the managing editor of TNW.

He leads our coverage of European tech and oversees our talented team of writers.

Away from work, he enjoys playing chess (badly) and the guitar (even worse).

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