Fake Biden robocalls in New Hampshire linked to Texas companies, officials say

State attorney general says source of calls identified and issued cease-and-desist orders as well as subpoenas to two companies

US authorities issued cease-and-desist orders on Tuesday against two Texas companies they believe were connected to robocalls that used artificial intelligence to mimic Joe Biden's voice and discourage people from voting in New Hampshire's first-in-the-nation primary last month.

During a news conference to discuss the investigation, officials described the calls as the clearest and possibly first known attempt to use AI to interfere with an election in the US.