From the White House:
CARNEY: We also need to understand that this is a fairly volatile situation and it is in response not to United States policy, and not to, obviously, the administration, or the American people, but it is in response to a video, a film that we have judged to be be reprehensible and disgusting. That in no way justifies any violent reaction to it, but this is not a case of protests directed at the United States writ large or at U.S. policy, this is in response to a video that is offensive to Muslims.
Again, this is not in any way justifying violence, and we have spoken very clearly out against that and condemned it. And the president is making sure in his conversations with leaders around the region that they are committed as hosts to diplomatic facilities to protect both personnel and buildings and other facilities that are part of the U.S. representation in those countries.