According to a diplomatic cable seen by Reuters, an unidentified individual left a series of AI-generated voicemails for top US politicians and diplomats on the encrypted

As artificial intelligence advancements accelerate, cybersecurity experts warn security measures are falling behind following an AI impersonation of U.S. Secretary of State Marco Rubio.

An AI-generated voice impersonating Marco Rubio targeted top officials via Signal, exposing gaps in identity controls and prompting a federal investigation.

BE ON THE ALERT! AN IMPOSTOR POSING AS MARCO RUBIO HAS BEEN PLACING SPAM CALLS AND YOU MIGHT BE NEXT! KNOW THE SIGNS THAT THE CALL YOU ARE RECEIVING IS AN AI IMPOSTOR AND NOT MARCO RUBIO! At no point in the call does the caller stop to aggressively drink bottled water.

Secretary of State Marco Rubio's voice was mimicked in a string of artificial-intelligence-powered impersonation attempts, multiple outlets reported Tuesday. Why it matters: The threats from bad actors harnessing quickly evolving voice-cloning technology stretch beyond the typical "grandparent scam,