Three months after reports surfaced about a cyberattack, called Salt Typhoon, targeting internet service providers and US wiretapping infrastructure, two of the largest telecom companies say they've made progress securing their networks against the threat.

U.S. telecom giants AT&T and Verizon say they have secured their networks after being targeted by the China-linked Salt Typhoon cyberespionage

AT&T blamed China for the hack. Verizon said a 'small number of high-profile customers in government and politics were specifically targeted' by a nation-state threat actor.