Rep. Don Bacon (R-Neb.) said Tuesday that he was the victim of a hacking attack by Chinese spies after hackers reportedly also managed to read emails belonging to State Department employees.

“I thank the FBI for notifying me that the CCP hacked into my personal and campaign emails from May 15th to June 16th of this year,” Bacon wrote Monday on X, the social media platform formerly known as Twitter, referring to the Chinese Communist Party. He added that the hackers “utilized a vulnerability in the Microsoft software” and that the breach was not caused by “user error.”