(Dublin) US President Joe Biden said he was “ concerned ” Thursday by the leak of classified US documents, but seemed to dismiss any immediate risk.

“I’m concerned this happened,” Joe Biden told reporters shortly after meeting Irish President Michael Higgins in Dublin. “ There is an ongoing investigation ” which seems to be on the verge of completion, he added.

The US Department of Justice has opened a criminal investigation after the documents leaked online, which detail Washington’s views on the war in Ukraine and appear to indicate intelligence gathering on close US allies.

The Pentagon considered that this disclosure represented a “ very serious risk ” for American national security.

The authenticity of these photographs, which circulate on various websites, has nevertheless still not been publicly confirmed by the authorities, nor could it be independently established.

According to the Washington Post, the leak is the work of a young man who worked on a military base and shared his information on a private group online.

With the pseudonym “OG”, he regularly published for months hundreds of pages copied from documents in the military base where he works, the newspaper says, adding that the person questioned refused to specify from which base he was. acted.

The documents posted online reveal US intelligence concerns about the viability of a Ukrainian counteroffensive against Russian forces, due to training and supply issues.

A document reviewed by AFP outlines US concerns over Ukraine’s ability to continue to defend against Russian strikes.