Air National Guardsman accused of posting classified documents online expected to plead guilty

Jack Teixeira, the Air National Guardsman accused of posting a trove of classified documents online, is expected to plead guilty to federal charges on Monday, according to a source familiar with the matter.

In a court filing Thursday, prosecutors in Boston asked for a so-called Rule 11 hearing – proceedings to discuss a change of plea. He previously pleaded not guilty.

This story is breaking and will be updated.