WikiLeaks founder Julian Assange and former U.S. Army intelligence analyst Chelsea Manning had reason to believe that leaking U.S. military reports "would cause injury" to the country, federal prosecutors alleged in a newly unsealed court filing on Monday.

In the affidavit submitted to federal court in Alexandria, Virginia, prosecutors said U.S. military reports from the wars in Afghanistan and Iraq included information about the "identity and significance of local supporters of U.S. and allied forces in Afghanistan."

When U.S. forces raided the compound in Pakistan where Osama bin Laden was hiding out, for example, they found a letter that showed the Al Qaeda leader was interested in copies of Pentagon documents that were published on WikiLeaks, the prosecutors said.