Pentagon probes impact of leak on US allies, Russia

A steady drip of dozens of documents and slides have made their way on to Twitter, Telegram, Discord and other sites.

American weapons sent to Ukraine include the long-range high mobility artillery rocket systems (Himars). Picture: AFP

The US is assessing how the apparent leak of a trove of highly classified documents could impact national security, the Pentagon said on Sunday.

The breach, being investigated by the Department of Justice, appears to include assessments and secret intelligence reports that touch on not only Ukraine and Russia but also highly sensitive analyses of US allies.

While the Defence Department is still reviewing the validity of photographed documents circulating online, they “appear to contain sensitive and highly classified material”, Deputy Pentagon press secretary Sabrina Singh said. “An interagency effort has been stood up, focused on assessing the impact these photographed documents could have on US national security and on our allies and partners,” Ms Singh said.

The Department of Justice said on Saturday it has been in touch with the Defence Department about the issue and had opened an investigation.

A steady drip of dozens of leaked documents and slides have made their way in recent days on to Twitter, Telegram, Discord and other sites, and new documents continue to surface.

US officials told the Washington Post that some documents appeared to have been manipulated but many were consistent with CIA World Intelligence Review reports that are shared at high levels within the White House, Pentagon and State Department.

Defence analysts say any breach of internal classified US documents would be both damaging and potentially embarrassing. In addition, the leak would prove valuable to Moscow by showing how deep US intelligence has penetrated parts of the Russian military apparatus, US media said.

Other documents include apparent information about internal debate within the governments of US allies. Among the documents, for example, were discussions about South Korea’s debate on whether to provide the US with artillery shells for use in Ukraine, The New York Times said.

AFP