Investigators for the Department of Justice discovered six items containing classified document markings during a 13-hour search on Friday of President Biden’s Delaware home, according to a statement from Bob Bauer, the president’s personal attorney.

The search, which Bauer said took place at the invitation of the president’s personal attorneys, uncovered documents that were from Biden’s time as vice president and a senator.

DOJ asked that the search remain private until after it took place, “in accordance with its standard procedures, and we agreed to cooperate,” Bauer said.

Neither the president nor the first lady was at the Wilmington residence at the time, according to Richard Sauber, a member of the White House Counsel’s Office.