Leaders of the House Committee on Oversight and Government Reform have issued a rare subpoena to Health and Human Services Secretary Kathleen Sebelius demanding documents on the $2 billion Obamacare health care co-op program, The Washington Examiner has learned.

The subpoena that was issued late Friday “requires HHS to produce all documents related to the reviews which assessed each CO-OP applicant’s financial viability, as well as communication between HHS employees, contractors and Executive Office employees discussing the applicants’ financial viability or ability to repay the CO-OP loan,” according to a committee statement released today.