FBI Director Christopher Wray warned lawmakers on Wednesday about the growing threat posed by Chinese hackers who are targeting U.S. electrical grids and other infrastructure during testimony before the House Select Committee on the Chinese Communist Party.

“China’s hackers are positioning on American infrastructure in preparation to wreak havoc and cause real-world harm to American citizens and communities, if or when China decides the time has come to strike,” Wray said in his opening remarks to the panel.

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