The Chinese-linked Salt Typhoon cyberespionage operation targeted AT&T and Verizon's systems, but the wireless carriers' U.S. networks are now secure as they work with law enforcement and government officials,

AT&T Inc. acknowledged that it had been hit by the China-linked Salt Typhoon hacking operation but that its networks were now clear from the intrusion.

Verizon Communications Inc. announced successful containment of a cyber incident known as the Salt Typhoon. An esteemed independent cybersecurity firm has validated the containment measures taken by Verizon,

The Chinese-linked Salt Typhoon cyberespionage operation targeted AT&T's systems, but the wireless carrier's U.S. networks are now secure as it works with law enforcement and government officials, the company said on Saturday in its first acknowledgment of the attacks.

Chinese hackers called Salt Typhoon have infiltrated a ninth telecommunications firm, gaining access to information about millions of people, U.S. cybersecurity officials say.