Washington ? The Pentagon says it believes the next document dump by WikiLeaks will be even more damaging to national security and the war effort than the organization’s initial release of some 76,000 war files.

Pentagon press secretary Geoff Morrell said Thursday that the military believes it has identified the additional 15,000 classified documents that WikiLeaks has vowed to release.

Morrell declined to identify the documents other than to say that their exposure would be ever more damaging than the thousands already published.

Last month, WikiLeaks posted online some 76,000 secret files that described in gritty detail U.S. operations in Afghanistan.