The FBI found tens of thousands of e-mails sent from Hillary Clinton's private email server on a laptop shared by top aide Huma Abedin and her husband Anthony Weiner, a senior law enforcement official told Fox News Saturday.
But federal investigators are not sure whether Abedin or Weiner, the disgraced former New York congressman, owned the laptop, the official said.
The agency said Friday that it was reopening its probe into Clinton's private email use during her four years as secretary of state.
The move was a result of the FBI's investigation into another of Weiner's "sexting" scandals, revealed in late August when the NY Post posted photos of his online exchange with a woman.
The new e-mails were considered "pertinent to the investigation," officials told Fox. The Clinton campaign has suggested that the documents were duplicates.
In July, the FBI concluded that Clinton had been "extremely careless" with her private server use despite finding several e-mails being marked as classified.
Attorney General Loretta Lynch days later accepted the agency's findings and closed the nearly two-year probe without bringing criminal charges.