WASHINGTON — Aides to President Joe Biden discovered at least one additional batch of classified documents in a location separate from the Washington office he used after leaving the Obama administration, according to a person familiar with the matter.

Since November, following the discovery of classified-marked documents in his former office, Biden aides have been searching for additional classified materials that could be in other places he used, said the source, who spoke on condition of anonymity to provide details about the ongoing inquiry.

The White House did not respond to a request for comment.

The initial discovery of classified documents in an office used by Biden after his vice presidency was first reported Monday by CBS News.

The classification level, number and precise location of the additional documents was not immediately clear. It was also not immediately clear when the additional documents were discovered and whether the search for any other classified material Biden may have from the Obama administration is complete.

Biden aides have been reviewing documents stored in locations beyond his former Washington office to determine if there are other classified documents that need to be turned over to the National Archives and reviewed by the Justice Department, the person familiar with the case said. business.

The search was described as exhaustive, with the goal of obtaining a full count of all classified documents that may have been inadvertently packed in boxes when Biden left the vice president’s office space in January 2017.

The White House issued a statement Monday confirming that a “small number of documents” bearing classified markings that appeared to be from the Obama administration were found on Nov. 2 at a Washington think tank linked to Biden.

The documents were discovered in a locked cabinet by Biden’s lawyers as they prepared to vacate office space at the Penn Biden Center for Diplomacy and Global Engagement, Richard Sauber, special counsel to the president, said in a statement Monday. .

The University of Pennsylvania had leased a suite of offices for the center in February 2018, including one for then-private citizen Biden’s personal use when he was in Washington.

Biden told reporters Tuesday that he was «shocked» by the discovery and did not know what was in the documents.

The chairman and vice chair of the Senate intelligence committee wrote to DCI Avril Haines requesting access to the classified documents, a damage assessment by the intelligence community and a briefing on the Biden and Trump documents, three members of the Senate said. congressional staff. This request is similar to how the committee requested information after the raid on former President Donald Trump’s Mar-a-Lago resort in Florida, the employees said.

Sauber said Biden’s lawyers immediately contacted the National Archives about the find and the agency took control of the documents the next day.

Two sources familiar with the matter said fewer than a dozen classified documents were found in the office.

The Archives referred the matter to the Justice Department.

US Attorney General Merrick Garland has asked John R. Lausch, US Attorney for the Northern District of Illinois and a Trump appointee, to review how the classified material ended up in the closet, a source familiar with the matter told NBC News on Monday.

“We are fully cooperating,” Biden said Tuesday.

Trump’s possession of more than 100 documents bearing classified marks despite being subpoenaed for return is the subject of a federal criminal investigation by the Justice Department.

Trump has repeatedly mocked Biden over the finding on his Truth Social account, while suggesting he has been unfairly targeted by federal investigators, despite the vastly different sets of facts between his case and Biden’s. «A giant scam,» he wrote.

they shine, frank thorp Y mike memoli contributed.