When FBI Director James Comey wrote his bombshell letter to Congress on Friday about newly discovered emails that were potentially “pertinent” to the investigation into Hillary Clinton’s private email server, agents had not been able to review any of the material, because the bureau had not yet gotten a search warrant to read them, three government officials who have been briefed on the probe told Yahoo News.

At the time Comey wrote the letter, “he had no idea what was in the content of the emails,” one of the officials said, referring to recently discovered emails that were found on the laptop of disgraced ex-Rep. Anthony Weiner, the estranged husband of top Clinton aide Huma Abedin. Weiner is under investigation for allegedly sending illicit text messages to a 15-year-old girl. READ MORE