Staffers from several House and Senate committees are to hear an "urgent" briefing from the State Department's inspector general concerning documents connected to the State Department and Ukraine, according to Washington sources.

The documents were obtained from the department's Office of the Legal Advisor, ABC News reported Tuesday evening.

The briefing was requested by State Department Inspector General Steve Linick, but exact details are not yet known.

The meeting is expected to be held in a secure location on Capitol Hill and comes during this week's congressional recess, and ABC reported it could be in connection to a whistleblower report concerning the State Department's role in actions between President Donald Trump's attorney Rudy Giuliani and officials from Ukraine.

According to CNN, the inspector general is expected to speak with committee staff from House Foreign Affairs, Senate Foreign Relations, House and Senate Appropriations, House Oversight, Senate Homeland Security, and Governmental Affairs, as well as from the House and Senate intelligence committees. The briefing will be held in a secure meeting room in the Capitol.

The inspector general's office works independently of State's political leadership, notes ABC News. The department has been criticized in recent weeks for its role in connecting Giuliani with Ukraine officials about investigating Democratic presidential candidate and former Vice President Joe Biden and his son Hunter.

The offer came about an hour after Secretary of State Mike Pompeo's letter that pushed back against depositions scheduled for State Department officials and a subpoena for documents, CNN's sources said.