China probes US firm Palo Alto Networks, escalating trade tensions

China launched a cybersecurity review of US firm Palo Alto Networks on Thursday, escalating trade tensions a day after new sanctions on US companies. The Cyberspace Administration of China said the probe aims to protect critical infrastructure and national security. Palo Alto Networks, a leading cybersecurity and cloud provider, serves thousands of clients across finance, technology and energy. The review follows Beijing's sanctions on several US firms and tightened drone export controls. Palo Alto Networks operates multiple offices in China, offering firewalls and cloud security platforms.