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 U.S. Treasury department on Friday sanctioned Singaporean Yin Kechen and cybersecurity company Sichuan Juxinhe Network Technology Co., accusing both of being involved in a series of hacks against American telecom companies.

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.

The State and Treasury Departments say Chinese cybersecurity vendor Sichuan Juxinhe is behind the hacks into numerous US telecommunications companies.

The U.S. Department of the Treasury's Office of Foreign Assets Control (OFAC) has sanctioned Yin Kecheng, a Shanghai-based hacker for his role in the recent Treasury breach and a company associated with the Salt Typhoon threat group.

The Treasury Department on Friday sanctioned Chinese firm Sichuan Juxinhe Network Technology Co. and Shanghai-based hacker Yin Kecheng for their roles in major hacks that allowed access to sensitive,