US guardsman held over release of classified military documents

The guardsman was identified as 21-year-old Jack Teixeira.

Police block a road in North Dighton, Massachusetts (Michelle R. Smith/AP)

A Massachusetts Air National Guard member has been arrested after the disclosure of highly classified military documents on the Ukraine war, US attorney general Merrick Garland said.

Investigators believe that the guardsman, who specialises in intelligence, led the online chat group where the documents were posted.