X CEO Linda Yaccarino said she’s stepping down after two years running Elon Musk’s social media platform. Yaccarino posted a positive message Wednesday about her tenure at the company formerly known as Twitter and said “the best is yet to come as X enters a new chapter with” Musk’s artificial intelligence company xAI, maker of the chatbot Grok.

It isn't immediately clear what led to the disturbing posts, whether due to a fault in the chatbot's programming or if Grok was just following orders.

Linda Yaccarino announced Wednesday she will resign as chief executive of Elon Musk’s X following a two-year tenure, a day after Musk’s AI chatbot made a series of antisemitic comments on the social media platform and appeared to praise Adolf Hitler.