June 13 (Reuters) - Amazon CEO Andy Jassey was among technology leaders who in recent days raised concerns with senior officials in President Donald Trump's administration about security risks in Anthropic's most advanced artificial intelligence models, a source familiar with the matter told Reuters.

Jassie's participation highlights Anthropic's extraordinary move on Friday to halt production of its newest models worldwide in response to national security orders issued by the Trump administration.

The San Francisco-based AI startup had previously warned of the hacking capabilities of its Mythos model and refrained from rolling it out widely.

But Anthropic launched a public version a few days ago called (Fable), which it said is equipped with cybersecurity protection measures.

Anthropic said in a blog post that the government informed them that it believes there is a way to bypass one of the safeguards that prevent the model from being used to find cybersecurity vulnerabilities.

The company added that the Trump administration ordered it to prevent any foreign nationals, whether inside or outside the United States, from using its two newest models, Fable 5 and Mythos 5. In response, Anthropic said it would disrupt access to the two models globally.

Amazon has not confirmed whether it has spoken to government officials about Anthropic models.