[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2010/images/08/01/art.gatesmullen0801.gi.jpg caption="Defense Secretary Gates, left, and Adm. Mullen, right, both spoke out Sunday about the recent disclosure of classified military documents by Wikileaks."]
Washington (CNN) - It is up to the Justice Department to determine if there will be criminal charges in the release of classified military documents by WikiLeaks, but Defense Secretary Robert Gates said Sunday the website is morally guilty for putting lives at risk.
On the ABC program "This Week," Gates declared himself "mortified" and "appalled" over the public dissemination of 76,000 documents that detailed military operations in Afghanistan.
"If I'm angry it is because I believe this information puts those in Afghanistan who have helped us at risk," Gates said, citing a Taliban statement that it would seek out informants and other collaborators exposed by the documents.
He said the issue involved two areas of culpability – legal and moral.
While the Department of Justice will decide on the legal questions, "there's also a moral culpability, and that's where I think WikiLeaks is guilty," Gates said.
Adm. Mike Mullen, the chairman of the Joint Chiefs of Staff, also cited the Taliban's threat to sources named in the leaked documents, saying the United States had a "moral obligation" to protect their safety.