Washington (CNN) Homeland Security Secretary Kirstjen Nielsen said Friday that Brock Long, the administrator for the Federal Emergency Management Agency, will reimburse the federal government as appropriate for his non-official use of government vehicles.

Nielsen said in a statement that she had completed a review of a Department of Homeland Security inspector general report probing Long's government vehicle use, which found that he had used government-owned cars for home-to-work transportation "without proper authorization."

"The Administrator acknowledged that mistakes were made, and he took personal responsibility," Nielsen said in a statement.

Despite earlier reports that suggested the secretary had asked Long to consider resigning, Nielsen also she has "full confidence" in the FEMA staff and Long's "ability to continue to perform."

Long also issued a statement, saying, "As the leader of this agency, I accept full responsibility for any mistakes that were made by me or the agency."

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