A coalition of women’s organizations, tech watchdogs, and progressive activists is urging Google, owned by Alphabet, and Apple to remove the social media platform X and its associated chatbot, Grok, from their app stores. In open letters released Wednesday, the coalition accused the Elon Musk-owned apps of producing illegal content that breaches both companies’ terms of service.

The effort, supported by groups including UltraViolet, the National Organization for Women, MoveOn, and ParentsTogether Action, seeks to pressure Musk after Grok began creating sexually explicit, degrading, or violent images of women and children. “We are imploring Apple and Google to take this extremely seriously,” Jenna Sherman, campaign director at UltraViolet, told Reuters ahead of the letters’ publication. “Their app stores are facilitating sexual abuse of thousands, if not tens of thousands, of people, particularly women and children.”

X did not respond to requests for comment. Its parent company, xAI, which powers Grok, dismissed the claims as “Legacy Media Lies.” Google and Apple also have not replied to repeated inquiries about X and Grok. Concerns have grown after X was flooded with highly realistic images of women and minors in revealing clothing at the start of the year. Malaysia and Indonesia have already banned Grok over explicit content, and European and UK authorities are conducting investigations or seeking explanations.

Meanwhile, some organizations and leaders are distancing themselves from X. The American Federation of Teachers announced on Tuesday that it would leave the platform due to indecent images of children generated by Grok. Although X has adjusted Grok so that images it produces or edits are no longer posted publicly, a Reuters test on Tuesday showed the chatbot could still generate bikini-clad versions of people’s photos on request. Sherman said that while Apple and Google claim to prioritize child protection, their response to X will reveal “what their values actually are in practice.”