The European Commission has launched an investigation into Elon Musk’s X over concerns its AI tool Grok was used to create sexualised images of real people.

It follows a similar announcement in January from the UK watchdog Ofcom.

Regina Doherty, a member of the European parliament representing Ireland, said the Commission would assess whether “manipulated sexually explicit images” have been shown to users in the EU.

A previous statement from X’s Safety account said the social media platform had stopped Grok from digitally altering pictures of people to remove their clothing in “jurisdictions where such content is illegal”.

But campaigners and victims said the ability to generate sexually explicit pictures using the tool should have “never happened” in the first place, and Ofcom said its investigation would remain ongoing.

The EU regulator said it may “impose interim measures” if X refuses to implement meaningful adjustments.

It said it had also extended its ongoing investigation launched in December 2023 over risks associated with X’s recommender systems – the algorithm that recommends specific posts to users.

Before the Commission’s announcement, Elon Musk posted a picture on X on Monday appearing to make light of the new restrictions in place around Grok.

The X owner has previously criticised those scrutinising the app’s image-editing function – particularly the UK government – calling it “any excuse for censorship”.

On Sunday, the Grok account on X claimed more than 5.5 billion images were generated by the tool in just 30 days.

In a statement to Reuters, Doherty said there were “serious questions” over if platforms such as X were meeting legal obligations “to assess risks properly and to prevent illegal and harmful content from spreading”.

“The European Union has clear rules to protect people online,” she said.

“Those rules must mean something in practice, especially when powerful technologies are deployed at scale.

“No company operating in the EU is above the law.”

A spokesperson from Coimisiún na Meán, Ireland’s media regulator, said it welcomed the news.

“There is no place in our society for non-consensual intimate imagery abuse or child sexual abuse material,” they said.

The move comes a month after the EU fined X €120m (£105m) over its blue tick badges, saying they “deceive users” because the firm is not “meaningfully verifying” who is behind the account.

In response, the US Secretary of State Marco Rubio and the Federal Communications Commission (FCC) accused the EU regulator of attacking and censoring US firms.

“The European Commission’s fine isn’t just an attack on X, it’s an attack on all American tech platforms and the American people by foreign governments,” he said.

His remarks were reposted by Musk, who added “absolutely”.