President Joe Biden over the last two days participated in a voluntary interview with special counsel Robert Hur as a part of his classified documents investigation, the White House announced Monday.

"The President has been interviewed as part of the investigation being led by Special Counsel Robert Hur," White House Counsel's Office spokesperson Ian Sams wrote in a statement Monday. "The voluntary interview was conducted at the White House over two days, Sunday and Monday, and concluded Monday."

"As we have said from the beginning, the President and the White House are cooperating with this investigation, and as it has been appropriate, we have provided relevant updates publicly, being as transparent as we can consistent with protecting and preserving the integrity of the investigation," Sams continued, referring additional questions to the Justice Department.

A spokesperson for Hur, who oversees the Justice Department's probe into classified documents found at Biden's home and former private office, declined to comment to CNN.

The interview was scheduled weeks ago, according to a person familiar with the matter.

The president had a light public schedule Sunday and Monday with no public events, and reporters were given relatively early notice that Biden would not have any public appearances. On Monday, the president met with administration officials about the fighting in Israel in the morning and spoke with allies in the afternoon.

This story is breaking and will be updated.