The European Union has formally announced that it suspects Twitter, now known as X, of violating its rules in areas such as countering illegal content and disinformation. Digital commissioner Thierry Breton outlined the alleged infringements in a post on the social media platform. X, which is owned by Elon Musk, is also suspected of breaching its obligations on transparency. X stated that it is cooperating with the regulatory process and emphasized the importance of a politically unbiased and lawful investigation. These are the first formal proceedings launched under the Digital Services Act (DSA), which imposes additional obligations on major tech companies to protect users from extreme content. Failure to do so can result in significant fines or suspension. The EU Commission will investigate X’s systems and policies related to the suspected infringements. The investigation will also assess the effectiveness of X’s Community Notes system, which allows contributors to comment on post accuracy. Concerns about the content on X have grown since Elon Musk acquired the platform, particularly due to layoffs of moderators. The European Commission has previously warned that X has the largest disinformation problem among major platforms. In the US, the presence of extremist material on the site has led to an advertising boycott, disputes between Musk and campaign groups, and speculation about potential bankruptcy for X.