Kim Jong Un, Public Domain Image

Newsweek has the details.

“While the U.S. continues to monitor reports surrounding the health of the North Korean Supreme Leader, at this time, there is no confirmation from official channels that Kim Jong Un is deceased,” a senior Pentagon official not authorized to speak on the record told Newsweek. “North Korean military readiness remains within historical norms and there is no further evidence to suggest a significant change in defensive posturing or national level leadership changes.”