What precisely the grand jury is investigation in regards to WikiLeaks is currently unknown.
Manning was ordered to be sent to jail by U.S. District Judge Claude Hilton after she told him she would not testify, the Associated Press reports.
Hilton said she would remain in jail until she testifies or a grand jury convenes, the news outlet reported.
Manning has signaled that she expected to be sent to jail. In a statement on Thursday she wrote that she was “prepared to face the consequences of my refusal.”
“Yesterday I appeared before a secret grand jury after being given immunity for my testimony,” she wrote. “All of the substantive questions pertained to my disclosures of information to the public in 2010–answers I provided in extensive testimony during my court-martial in 2013. I respond to each question with the following statement: ‘I object to the question and refuse to answer on the grounds that the question is in violation of my First, Fourth, and Sixth Amendment, and other statutory rights.”
Manning was sentenced to more than 30 years in prison in 2013 for leaking military documents to Wikileaks, but her sentence was commuted by former President Barack Obama in 2017.
You can read all of the Associated Press report here.