The US has issued sanctions against an individual and a company involved in recent high-profile compromises of government officials by Chinese state-affiliated hackers

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

A recent breach of the US Treasury yielded access to Secretary Janet Yellen's computer along with those of two of her lieutenants, according to inside sources speaking to Bloomberg News reporters.