WORCESTER, Mass. (AP)  A Massachusetts Air National Guard member charged with leaking highly classified military documents will remain behind bars while he awaits trial, a federal magistrate judge ruled Friday.

U.S. Magistrate Judge David Hennessy said releasing 21-year-old Jack Teixeira would pose a risk that he would attempt to flee the country or obstruct justice. The judge cited Teixeira’s “fascination with guns,” disturbing online statements and admonitions by Teixeira’s military superiors about his handling of sensitive information before his arrest.

The ruling comes after prosecutors revealed that Teixeira had a history of violent rhetoric, and was caught by fellow military members months before his arrest taking notes on classified information or viewing intelligence not related to his job.

Teixeira is accused of sharing classified military documents on Discord, a social media platform popular with people playing online games. The stunning breach exposed to the world unvarnished secret assessments on Russia’s war in Ukraine, the capabilities and geopolitical interests of other nations and other national security issues.