Biden's aides discovered a second batch of classified documents at another location, report says

President Joe Biden's aides discovered a second batch of classified documents stored at a separate location than his private office at a Washington, DC think tank, NBC News reported Wednesday.

The report said that it's unclear how many documents were in the batch, where or when exactly they were discovered, or what their classification level was.

Wednesday's news comes after the White House disclosed earlier this week that a "small" number of classified documents were found in a "locked closet" at Biden's old office at the Penn Biden Center for Diplomacy and Global Engagement, prompting House Republicans to demand an assessment of the files and their potential harm to national security.

CNN reported that Biden wasn't aware the documents were in his office at the Penn Biden Center, and didn't become aware of that fact until his personal attorneys notified the White House counsel's office. The report also said Biden and the White House's legal team don't know what's in the documents.

Attorney General Merrick Garland tapped John Lausch, the Trump-appointed US attorney in Chicago, to look into the matter, according to CBS News, and Lausch been investigating it since November. A source familiar with the matter told CNN that Lausch has finished the initial part of his investigation and presented his preliminary findings to Garland.

This story is breaking. Check back for updates.