The State Department’s inspector general is expected to brief staffers from several House and Senate committees on Wednesday afternoon about documents obtained from the department’s Office of the Legal Adviser concerning documents related to the State Department and Ukraine, sources familiar with the planned briefing told ABC News.

Details of the briefing, expected to be conducted by Steve Linick, the inspector general at State, remain unknown. Linick is expected to meet with congressional staff in a secure location on Capitol Hill.

The unusual nature and timing of the briefing – during a congressional recess – suggest it may be connected to a recent intelligence community whistleblower allegation which describes, in part, the State Department’s role in coordinating interactions between Rudy Giuliani, the president’s personal attorney, and Ukrainian officials.