U.S. District Judge Claude Hilton ordered Manning to jail Friday after a brief hearing in which Manning confirmed she has no intention of testifying.
According to CBS News, Manning told the judge she “will accept whatever you bring upon me.”
Manning has said she objects to the secrecy of the grand jury process, and that she already revealed everything she knows at her court martial.
She was convicted in 2013 for the unprecedented leak that included millions of State Department cables and a classified video of a US helicopter firing on civilians and journalists in Iraq in 2007. Then-President Barack Obama commuted her 35-year sentence in 2017.
The judge said she will remain jailed until she testifies or until the grand jury concludes its work.
Manning’s lawyers had asked that she be sent to home confinement instead of the jail, because of medical complications she faces, but the judge said U.S. Marshals can handle her medical care.