Rep. Darrell Issa asked the State Department on Wednesday to explain the status of four employees who were put on paid leave as a result of the investigation into the attacks on the U.S. consulate in Benghazi that killed four Americans last Sept. 11.

In a letter Issa wrote to Secretary of State John Kerry, the Republican chairman of the House Oversight Committee said that the workers were put on leave more than seven months ago, Politico reports.

Little has been done in the interim to determine their status, Issa said.

“Witnesses interviewed by the committee — including officials named by the ARB and their supervisors — are uncertain how and why the Secretary settled on paid administrative leave as appropriate course of action,” Issa wrote to Kerry. He was referring to the Accountability Review Board.