AT&T Inc. and Verizon Communications Inc. acknowledged that they’d been hit by the China-linked Salt Typhoon hacking operation but that their networks were now clear from the intrusion.

The telecom companies say they're no longer detecting activity from foreign entities that were hacking their networks.

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,