Obama says in a speech Tuesday before the U.N. General Assembly that "there are no words that excuse the killing of innocent" and "no video that justifies an attack on an embassy." 

Obama says the video "is an insult not only to Muslims, but to America as well." 

The president was speaking in the aftermath of violent protests in the Middle East and North Africa connected to the release of an anti-Muslim video produced in the United States. 

Four Americans were killed in Libya, including U.S. Ambassador Chris Stevens, along with more than 50 others in the violence.

(Copyright 2012 by The Associated Press. All Rights Reserved.)