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.

François Chollet, a leading figure in the AI world, is leaving Google after close to a decade. In a post on X, the 34-year-old French developer said he's starting a new company with "a friend," but he declined to reveal many details. "I'm very grateful for my decade at Google," Chollet wrote in the post.

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.