The FBI did not have a search warrant Saturday to review newly obtained emails linked to the investigation into Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college MORE's email server.

FBI Director James Comey sent a letter to lawmakers Friday revealing the emails despite agents not having yet received a warrant to read them, Yahoo News reported.

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Investigators still had not secured a warrant to review the emails as of Saturday night, Yahoo News reported. That echoed reporting from CBS News earlier Saturday.

One of the government officials quoted by Yahoo News said the FBI director "had no idea what was in the content of the emails" when he wrote the letter to lawmakers.

Comey said in his brief letter to lawmakers that emails had been discovered during a separate probe that "appear to be pertinent" to the investigation into Clinton's server.

Authorities discovered the emails when they seized electronic devices belonging to Clinton aide Huma Abedin and her estranged husband, former Rep. Anthony Weiner (D-N.Y.).

The emails purportedly belong to Abedin and were taken off a laptop used by Weiner, who is under investigation for allegedly carrying on an online relationship with a 15-year-old girl.

Comey's letter Friday sparked a political firestorm within two weeks of the election, with Clinton's campaign pushing the FBI to release more information about the emails linked to the Democratic presidential nominee.