The FBI is investigating a massive government attack that is believed to have compromised the information of four million federal workers, and agents are pointing fingers at China.

The hack is thought to be the biggest ever to hit the federal government.

The breach was initially believed to have targeted Office of Personnel Management and Department of Interior workers only. But investigators now say the hack hit nearly every federal government agency.

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And the FBI is warning: The Chinese government and military are suspected of compiling a massive database on Americans.

Fox News reported names, addresses and Social Security numbers of the entire federal workforce were likely swept up by hackers.

A spokesman for the Chinese Embassy in Washington denied involvement.

“Cyberattacks conducted across countries are hard to track and therefore the source of attacks is difficult to identify,” said Zhu Haiquan, CNN reported. “Jumping to conclusions and making hypothetical accusation is not responsible and counterproductive.”

The concern is China could now use that information to blackmail high-ranking government officials with top security clearances.

This isn’t the first time China’s hacked into America’s databases.

As WND previously reported, hackers working for the Chinese government, as well as with Islamic terror groups, broke into yet another American news site. The latest in late May was the Washington Post’s, where hackers redirected site visitors to a page under the control of the pro-President Bashar Assad group, the Syrian Electronic Army.


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