Defense Secretary Chuck Hagel said the US has evidence that chemical weapons were used in Syria. Intelligence reports concluded with "some degree of varying confidence that the Syrian government used sarin gas."
In Abu Dhabi, Hagel told reporters the White House wrote letters to Sens. John McCain, R-Ariz., and Carl Levin, D-Mich., to inform them that "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, but President Obama warned the use or transfer of chemical weapons would be a "game-changer."
White House legislative director Miguel Rodriguez wrote in a letter to Congress that "because the president takes this issue so seriously, we have an obligation to fully investigate any and all evidence of chemical weapons use within Syria."