The Chinese military is ramping up its ability to disrupt key American infrastructure, including power and water utilities as well as communications and transportation systems, according to U.S. officials and industry security officials. Hackers affiliated with China’s People’s Liberation Army have burrowed into the computer systems of about two dozen critical entities over the past year, these experts said.

The intrusions are part of a broader effort to develop ways to sow panic and chaos or snarl logistics in the event of a U.S.-China conflict in the Pacific, they said.

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