The Treasury Department announced sanctions Friday in connection with a massive Chinese hack of American telecommunications companies and a breach of its own computer network. The sanctions target a Chinese hacker who officials say is affiliated with Beijing's Ministry of State Security and who was involved in a cyber-intrusion

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.

A Chinese hack compromised even more U.S. telecoms than previously known, including Charter Communications , Consolidated Communications (CCII.UL) and Windstream, the Wall Street Journal reported late on Saturday,

The U.S. Treasury Department has sanctioned Yin Kechen and Sichuan Juxinhe Network Technology Co. for their alleged involvement in 'Salt Typhoon,' a series of hacks compromising American telecom companies.

The U.S. Treasury department on Friday issued cyber-related sanctions related to the Salt Typhoon hack on Singaporean Yin Kechen and cybersecurity company Sichuan Juxinhe Network Technology Co., according to a statement.

The outgoing head of the Federal Communications Commission said a massive Chinese-linked cyber-espionage operation against U.S. telecoms firms known as "Salt Typhoon" is a "clarion call" to address significant telecommunications security issues.

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

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