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.

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.

Deputy National Security Adviser Anne Neuberger said that 'a large number' of Americans were impacted, with many working in government and politics and living in the 'Washington-Virginia area.'

U.S. officials have added a ninth telecommunications company to the list of entities compromised by a sweeping Chinese-linked cyberespionage operation known as Salt Typhoon, a top White House official said Friday.

Even in a year of high-profile Chinese cyberattacks, the Salt Typhoon campaign has stood out.

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

AT&T (NYSE:T) said Saturday it was hit by the Salt Typhoon hacking attack, but its networks have been cleared, Bloomberg reported. According to the report, AT&T said in a statement that the China-linked hackers tried to access information on foreign intelligence.