A federal judge has ordered portions of special counsel Robert Mueller's report to be unredacted and made public in the criminal case against former national security adviser Michael Flynn.

U.S. District Judge Emmet Sullivan issued the limited order Thursday. Portions of the report relating to Flynn are redacted and would be made public under the order.

It is the first time a federal judge has ordered the Justice Department to make public portions of the report the agency had kept secret.

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Mueller officially concluded his investigation in March. Attorney General William Barr released a redacted version of Mueller's report in April.

Flynn is awaiting sentence after admitting to lying to the FBI about his conversations with the Russian ambassador to the United States.