The EU has opened an investigation into Elon Musk's X over the possible spread of terrorist and violent content, and hate speech, after Hamas' attack on Israel. The EU's industry chief, Thierry Breton, confirmed on Thursday the bloc had sent Twitter/X a "formal request for information" to determine whether the platform was complying with the Digital Services Act (DSA) - a law designed to protect users of big tech platforms which came into effect November, as misinformation about the conflict between Israel and Hamas spreads on social media. In a statement on Thursday, the EU said “the European Commission services sent to X a formal request for information under the Digital Services Act (DSA)”. “This request follows indications received by the Commission services of the alleged spreading of illegal content and disinformation, in particular the spreading of terrorist and violent content and hate speech. The request addresses compliance with other provisions of the DSA as well.” In his letter to Musk, Breton said "violent and terrorist content" had not been taken down from X, despite warnings. Breton did not give details on the disinformation he was referring to in the letter, but said instances of "fake and manipulated images and facts" were widely reported on the social media platform. Responding on X, Musk said: "Our policy is that everything is open and transparent, an approach that I know the EU supports. "Please list the violations you allude to on X, so that the public can see them." X chief executive Linda Yaccarino also said earlier on Thursday the platform had removed hundreds of Hamas-affiliated accounts and taken action to remove or label tens of thousands of pieces of content since Saturday's attack. Sign up to our free Indy100 weekly newsletter Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.