FBI officials made public Tuesday the search warrant that was used to review potentially classified emails discovered on a laptop belonging to Anthony Weiner in October.

The 21-page warrant described the "probable cause" agents had for searching Weiner's computer, which was obtained through a separate FBI investigation related to the disgraced former Democratic congressman's alleged sexual misconduct.

After agents seized the laptop and reviewed "thousands" of emails believed to contain classified information, FBI Director James Comey told members of Congress that his bureau planned to take "investigative steps" in the closed probe of Hillary Clinton's private email network.

Many Democrats have blamed that letter for Clinton's loss in the presidential race just days later.

But the warrant released Tuesday makes clear that FBI investigators believed Weiner's laptop may have housed email correspondence between Clinton and an individual whose name was redacted. Because many of the previously-reviewed emails between Clinton and that person had been classified, agents argued the newly-discovered conversations could reasonably be expected to contain classified information as well.

In July, Comey announced he was closing the original FBI investigation of Clinton without recommending an indictment despite the fact that Clinton had demonstrated "extreme carelessness" with her treatment of sensitive material.