At least three foreign ministers, a U.S. governor and a member of Congress all received outreach from the fake Rubio, according to a State Department cable.

A person or people imitating the secretary of state used artificial intelligence to send text and voice messages to foreign diplomats and U.S. officials, the department said in a cable to employees.

The State Department is investigating an imposter pretending to be Secretary of State Marco Rubio who has contacted foreign ministers and other U.S. officials. The impersonation campaign began in mid-June when the individual or individuals responsible created a Signal account with the display name “Marco.