Elon Musk’s Grok has been blocked by Indonesia and Malaysia, the first countries to do so after the artificial intelligence tool’s “digital undressing” function flooded the internet with photos of women and minors in suggestive and obscene manipulated images.

The U.K.’s communications watchdog has launched an investigation into Elon Musk’s X social media platform over concerns linked to its Grok AI service.

The UK communications regulator Ofcom said Monday that it is formally investigating whether X, a subsidiary of xAI, breached the nation’s Online Safety Act, potentially exposing the platform to fines ...