The US Defence Department has called on the whistle-blower website WikiLeaks not to go ahead with its plan to release 15,000 more documents on the war in Afghanistan, calling it "the height of irresponsibility," dpa reported.
"It would compound a mistake that has already put far too many lives at risk," Pentagon spokesman Geoff Morrell was quoted as saying by CNN late Thursday.
The website, which in July published 76,000 classified documents on the war, was "about halfway through [preparing the new documents]," head Julian Assange told reporters in a video conference.
US and other authorities have said the releases undermine the war effort.
"If they were to publish any additional documents after hearing our concerns about the harm it will cause our forces, our allies and innocent Afghan civilians, it would be the height of irresponsibility," Morrell said.
He called on WikiLeaks to "immediately remove all the stolen documents from their website and expunge all classified material from their computers."
There was no schedule for the release of the additional material, Asssange said.
The Pentagon has announced an inquiry into the source of the leak.