Benghazi Panel and State Department Spar Over Documents

WASHINGTON—The House Benghazi Committee and the State Department are at an impasse over a number of documents the panel is seeking in its investigation into the 2012 terrorist attack that killed four Americans in Libya.

Citing “institutional interests” and “confidentiality,” the State Department has on four occasions chosen to withhold some documents from committee investigators, according to letters from the department to Congress...