The Massachusetts Air National Guardsman, charged with leaking top-secret military documents, has been charged on federal felony charges, the Justice Department said Thursday.

Jack Teixeira faces six counts in the indictment of willful retention and transmission of national defense information.

He was arrested in April on charges of sharing top-secret military documents about Russia’s war in Ukraine and other important national security issues in a chat room on Discord, a social media platform that started out as a hangout for gamers. The stunning breach exposed to the world, unvarnished secret assessments of Russia’s war in Ukraine, the capabilities and geopolitical interests of other nations, and other national security issues.

A judge last month ordered him to remain in jail while he awaits trial, saying releasing Teixeira would risk him trying to flee the country or obstructing justice.

His family has expressed support for him and his lawyers had urged the judge to release him to his father, saying he has no criminal record.