Biden Aides, Discover Additional, Classified Documents.br Biden aides have been searching for any additional classified materials since November when classified documents were found in the president's former office.br News of the initial discovery br of classified documents was first br reported by CBS on January 9.br NBC reports that the aidesbr have found more classified br documents in another location.br The classification level, br number and specific location of the new batch br of classified documents remains unknown. .br According to NBC, it also remains unclear when br the documents were discovered and if the search br for any other classified documents is complete.br The exhaustive search reportedly has the goal br of obtaining a full accounting of all classified documents br from Biden's time in the Obama administration. .br The exhaustive search reportedly has the goal br of obtaining a full accounting of all classified documents br from Biden's time in the Obama administration. .br On January 9, the White House acknowledged that br the initial documents marked classified had been br found at a Washington think tank tied to Biden.br On January 9, the White House acknowledged that br the initial documents marked classified had been br found at a Washington think tank tied to Biden.br According to Richard Sauber, special counsel to the br president, the documents were found at the Penn br Biden Center for Diplomacy and Global Engagement.br On January 10, President Biden said that he br was "surprised" by the discovery and that br he was unaware the documents were there.br NBC reports that the National Archivesbr has referred the matter of the classified br materials to the Justice Department. .br NBC reports that the National Archivesbr has referred the matter of the classified br materials to the Justice Department.