A covert intensive investigation, by the US consul general in Istanbul, Scott Fredric Kilner, into chemical weapons in Syria has concluded that the Syrian military used them against its own people, in a deadly attack last month.

A confidential State Department cable , signed by Kilner, outlined the investigation's findings regarding chemical weapons usage in Syria. Kilner's investigation included interviews with doctors on the ground that concluded that chemical agents had been used.

The US consulate, Kilner, warned that if the U.S government failed to react strongly to the usage of chemical weapons, Assad was likely to increase his use of such weapons of mass destruction.

"The regime is pursuing a policy of escalation to see what they can get away with as the regime is getting more desperate," an administration official added.

Commenting on the claims of chemical weapons usage on the 23rd December, an Obama administration official, who reviewed the document, noted that they "can't definitely say 100 percent, but Syrian contacts made a compelling case that Agent 15 was used in Homs Dec.23."

Speaking to reporters about the content of the cable, the US State Department Spokesman, Patrick Ventrell, reiterated the official stance on Syria.

"I'm not going to comment on the alleged content of a classified cable. As you know, the United states closely monitors Syria's proliferation-sensitive materials and facilities, and we believe Syria's chemical weapons stockpile remains secured by the Syrian government. We have been clear that if Assad's regime makes the tragic mistake of using chemical weapons or failing to secure them, it will be held accountable."

The evidence of chemical weapons surfaces as the situation in Syria continues to deteriorate, with both the rebels and the government blaming each other for a devastating bomb blast that occurred today, killing 82 university students