China on Sunday accused the United States of conducting cyberattacks on Beijing's national time centre that could have caused severe damage to critical financial and telecommunications infrastructure.

Beijing has stepped up espionage warnings in recent years as relations with the United States and other Western nations have worsened.

Chinese authorities found "irrefutable evidence" of efforts by the US National Security Agency (NSA) to hack the National Time Service Center, between 2022 and 2024, according to a statement published on the official Ministry of State Security WeChat account.

The facility is responsible for coordinating clocks around the country used by everything from computer servers to train stations and power grids.

The ministry accused the NSA of exploiting weaknesses

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