T-Mobile's network was among the systems hacked in a damaging Chinese cyber-espionage operation that gained entry into multiple U.S. and international telecommunications companies, The Wall Street Journal reported on Friday citing people familiar with the matter.

This is the ninth known cyberattack to target T-Mobile in recent years, according to an ongoing count by TechCrunch.

T-Mobile US Inc.’s network was among those recently breached by Chinese hackers in an attack on multiple telecommunications companies, the Wall Street Journal reported.

The carrier joins a growing list of known victims, including AT&T and Verizon, of the major Chinese spying operation.

Hackers linked to a Chinese intelligence agency were able to breach T-Mobile as part of a monthslong campaign to spy on the cellphone communications of high-value intelligence targets, the Journal added,

Multiple US carriers have been targeted by attacks from China in recent months. The FBI appears to be quite active in what appears to be an organized hacking campaign from China t

T-Mobile's (NASDAQ:TMUS) network was among the systems hacked in a Chinese cyber-espionage operation that gained access into multiple U.S. and international telecommunication companies, the Wall Street Journal reported Friday,