The FBI is investigating a new batch of emails related to Hillary Clinton, these reportedly obtained by agents during a separate probe into the Anthony Weiner sexting scandal.

FBI Director James Comey said Friday in a letter to Congress that the bureau has not read the emails but wants an investigation to move forward so agents can begin combing through them. The letter comes 11 days before the nation's presidential election and has revived controversy around the broader email controversies that have long dogged the former secretary of state and her campaign.

Comey said the FBI found the emails "in connection with an unrelated case" but did not specify which one. The New York Times, though, first reported that the emails were discovered on devices belonging to Weiner, the disgraced former U.S. Rep. from New York, and his wife, Huma Abedin, a top aide to Clinton. Weiner in August was caught sending lewd pictures of himself with his infant son also in the frame. In September, a 15-year-old girl came forward to say Weiner sexted with her. Weiner and Abedin have since separated.

In a press conference Friday night, Clinton called on the FBI to release the "full and complete facts." She said she has "heard the rumors" that Weiner's investigation was involved but didn't know whether that was true or not. "We don't know what to believe, and I'm sure there will be even more rumors," she said. "That's why it is incumbent on the FBI to tell us what they're talking about. Right now, your guess is as good as mine. And I don't think that's good enough."

Comey's letter was short on details. He did not say who sent or received the emails, what they may have contained, how the FBI discovered them or how long a new probe may take.

"I am writing to inform you that the investigative team briefed me on this yesterday," the letter said, "and I agreed that the FBI should take appropriate investigative steps designed to allow investigators to review these emails to determine whether they contain classified information, as well as to assess their importance to our investigation."

Clinton campaign chairman John Podesta said Comey "should immediately provide the American public more information than is contained in the letter" sent Friday. Podesta took exception to the idea that the FBI was "reopening" its investigation into Clinton because "we have no idea what those emails are and the Director himself notes they may not even be significant."