US arrests suspect behind leak of Pentagon documents

Jack Teixeira was arrested at his home in the town of North Dighton by FBI agents. Helicopter news footage showed a young man with shorn dark hair, an olive green T-shirt and red shorts being made to walk backwards towards a team of agents standing by an armoured vehicle dressed in camouflage and body armour, pointing their rifles at him.

Garland said the air national guardsman would make an initial appearance at the Massachusetts district court in Boston.

Teixeira is believed to have been the leader of an online chat group where hundreds of photographs of secret and top-secret documents were first uploaded, from late last year to March. The online group called itself Thug Shaker Central, made up of 20 to 30 young men and teenagers brought together by an enthusiasm for guns, military gear and video games. Racist language was a common feature of the group.

Former members of Thug Shaker Central have told the investigative journalism organisation Bellingcat, the Washington Post and the New York Times that the documents were shared in an apparent attempt to impress the rest of the group, rather than to achieve any particular foreign policy outcome.

Speaking in Ireland, Joe Biden sought to play down the impact of the breach.

The Guardian has seen about 50 of the documents. But there are signs that many more were first posted on Thug Shaker Central. The New York Times said it had seen about 300 of the documents, only a fraction of which have so far been reported, indicating the national security damage could be worse than has so far been acknowledged.

Part of the inquest into the leak will examine how a 21-year-old air national guardsman in Massachusetts could have access to top-secret material vital to US and allied security interests, including battlefield deployments in Ukraine. The Pentagon said on it was reviewing its policies on safeguarding classified material, including updating distribution lists and assessing how and where intelligence is shared.