The FBI has asked the public for information on Chinese Salt Typhoon hackers behind widespread breaches of telecommunications providers in the United States and worldwide.

In October, the FBI and CISA confirmed that the Chinese state hackers had breached multiple telecom providers (including AT&T, Verizon, Lumen, Charter Communications, Consolidated Communications, and Windstream) and many other telecom companies in dozens of countries.

As revealed at the time, while they had access to the U.S. telecoms’ networks, the attackers also accessed the U.S. law enforcement’s wiretapping platform and gained access to the “private communications” of a “limited number” of U.S. government officials.