U.S. Defense
According to the United States Department of Defense, an airstrike that hit a hospital in Kunduz, Afghanistan, last October did not amount to a war crime because the airstrike was "unintentional" and that those involved would face suspension but not criminal charges. In response to the briefing, a president of the organization which operated the hospital described it as "an admission of an uncontrolled military operation in a densely populated urban area, during which US forces failed to follow the basic laws of war."
Sources: BBC