WASHINGTON (AP) — The State Department promised Wednesday to cooperate with the House special committee looking into the deadly 2012 attack in Benghazi, Libya, expressing hope the new investigation is conducted in a fairer and more bipartisan manner than previous Republican-led probes.

In a letter to the panel’s GOP chairman and top Democrat, Assistant Secretary of State Julia Frifield said the department feels questions have been answered about the assault that killed U.S. Ambassador Chris Stevens and three other Americans. But she said officials were determined to build a constructive relationship with lawmakers conducting the special investigation.