French police raided the offices of Elon Musk’s social media network X on Tuesday, and prosecutors ordered the tech billionaire to face questions in a widening investigation, amid growing scrutiny of the platform by authorities across Europe.

The raid by the Paris prosecutor’s cybercrime unit and Musk’s summoning — which could further increase tensions ?between Europe and the U.S. over Big Tech and free speech — are linked to a yearlong investigation into suspected abuse of algorithms and fraudulent data extraction ?by ?X or its executives.

Britain’s privacy watchdog, meanwhile, also kicked off a formal investigation into Musk’s artificial-intelligence chatbot Grok over the ?processing of personal data and its potential to produce harmful sexual images and video content.