Elon Musk looks on as President Donald Trump speaks at the U.S.-Saudi Investment Forum at the John F. Kennedy Center for the Performing Arts in Washington, Nov. 19, 2025.

Brendan Smialowski | Afp | Getty Images

French cybercrime authorities have escalated an investigation of Elon Musk and his social network X to a criminal probe, the Paris prosecutor's office said Thursday.

Musk and former X CEO Linda Yaccarino were issued summons by French authorities for April 20. Both of them declined to appear and answer questions, according to the prosecutor's office.

In February, Musk called the probe a " political attack ," after French authorities raided the Paris office of X.

The probe, requested by French Member of Parliament Éric Bothorel in early 2025 , has focused on complaints of algorithmic manipulation by X to influence and interfere in French politics, and allegations that Musk and X knowingly allowed users of the AI chatbot Grok to create and spread Holocaust denials and nonconsensual sexually explicit…