A 21-year-old US Air National Guardsman has been arrested over a leak of classified military intelligence that has rattled the US and its allies.

Jack Teixeira, who reportedly shared the files in an online gaming chatroom, faces charges under the Espionage Act.

Aerial footage showed officers making an arrest at Mr Teixeira’s family home in Dighton, Massachusetts.

The documents he leaked revealed intelligence about the war in Ukraine and US spying on allies.

Mr Teixeira is expected to make his first court appearance in Boston today Friday.