The State Department says it is investigating the incident, in which an "unknown individual" impersonated Rubio through the app Signal.

The recipients of the scam messages, which were sent by text, Signal and voice mail, were not identified in the cable, a copy of which was shared with the Associated Press.

Someone using artificial intelligence to impersonate Secretary of State Marco Rubio contacted at least five people, including three foreign ministers, a US governor, and a member of Congress, “with the goal of gaining access to information or accounts,