The Chinese-linked Salt Typhoon cyberespionage operation targeted AT&T's systems, but the wireless carrier's US networks are now secure as it works with law enforcement and government officials, the company said on Saturday (Dec 28) in its first acknowledgement of the attacks.

"We detect no activity by nation-state actors in our networks at this time. Based on our current investigation of this attack, the People's Republic of China targeted a small number of individuals of foreign intelligence interest," an AT&T spokesperson said.

While only a few cases of compromised information were identified, AT&T was monitoring and remediating its networks to protect customers data, and continues to work with authorities to assess and mitigate the threat, the spokesperson said.

On Friday, US officials added a ninth unnamed telecom company to the list of entities compromised by the Salt Typhoon hackers and said the Chinese involved gained access to networks and essentially had broad and full access, giving them the capability to "geolocate millions of individuals, to record phone calls at will."

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