The Treasury Department has announced sanctions in connection with a massive Chinese hack of American telecommunications companies and a breach of its own computer network.

The US sanctioned Yin Kecheng, linked to China’s MSS, for hacking the Treasury Department, and Sichuan Juxinhe Network Technology Co., tied to Salt Typhoon, for targeting US telecoms and politicians like Donald Trump and Kamala Harris.

The U.S. Treasury Department said Sichuan Juxinhe Network Technology Co. was directly involved in the deep compromises of the telecommunications firms.

The Biden administration on Friday announced sanctions on two Chinese entities accused of cyberattacks, including a firm it said is directly involved in the recent espionage campaign against US telecommunications firms and a hacker behind the recent breach of Treasury Department computers.

U.S. Treasury Secretary Janet Yellen's computer was hacked and unclassified files were accessed as part of a broader breach of the Treasury Department by Chinese state-sponsored hackers, Bloomberg News reported on Thursday,