U.S. Ambassador to the UN, Susan Rice, said on Wednesday she doubts the willingness of the Syrian regime to follow through on a ceasefire initiated by UN envoy Lakhdar Brahimi.

"The atrocities that the regime is carrying out in Syria threaten to compromise the security of the entire region," Rice said. She stressed, however, that the United States supports Brahimi’s efforts to bring an end to the crisis in Syria.