New Delhi, Jan. 11 -- Elon Musk's AI chatbot Grok is preventing non-paying users from generating or editing images after a global backlash erupted over sexualized deepfakes of people, but the change has not satisfied authorities in Europe.

The chatbot, which is accessed through Musk's social media platform X, has in the past few weeks been granting a wave of what researchers say are malicious user requests to modify images, including putting women in bikinis or in sexually explicit positions.

Researchers have warned that in a few cases, some images appeared to depict children. Governments around the world have condemned the platform and opened investigations.

On Friday, Grok responded to image altering requests with the message: "Image...