The source of the leaks is not yet clear, but US officials have suggested that Russia or pro-Russian elements are likely behind the first batch of leaks. The contents of the documents resemble daily non-public updates from the U.S.
military's Joint Chiefs of Staff, and appear to detail US and NATO assistance to Ukraine. Other material suggests that America is spying on Israel and South Korea, including national security details about the Middle East and China. Some say that even if the documents were original, some of the information contained in them may have been changed. For example, estimates of deaths among Russian troops in certain documents are much lower than those provided by US officials.