Hagel, speaking to reporters in Abu Dhabi, said the White House has informed two senators by letter that, within the past day, "our intelligence community does assess, with varying degrees of confidence, that the Syrian regime has used chemical weapons on a small scale in Syria, specifically, the chemical agent sarin."

"It violates every convention of warfare," Hagel said.

No information was made public on what quantity of chemical weapons might have been used, or when or what casualties might have resulted.

President Barack Obama has said the use of chemical weapons would be a "game-changer" in the U.S. position on intervening in the Syrian civil war, and the letter to Congress reiterates that the use or transfer of chemical weapons in Syria is a "red line for the United States." However, the letter also hints that a broad U.S. response is not imminent.

http://news.yahoo.com/hagel-says-syria-used-chemical-weapons-155008837--politics.html