A special House panel investigating the Sept. 11, 2012, terrorist attacks on the U.S. consulate in Benghazi, Libya, has uncovered tens of thousands of new documents, but is still facing “obstacles” from the Obama administration, an interim report issued Monday said.

An “Interim Progress Update” was released Monday revealing the investigation “has uncovered new witnesses, new documents, new facts and will result in the most detailed and complete accounting of what happened in Benghazi.”