A new report from the United Nations says there is "clear and convincing evidence" that chemical weapons were used in Syria.
The U.N. team investigating the evidence on the ground presented its report to Secretary-General Ban Ki-moon over the weekend, who in turn gave it to the Security Council on Monday.
The highly anticipated report does not specify which side is responsible for last month's attack that killed more than 1,400 people, including hundreds of children.
The report provides more than 50 interviews with survivors and medical staff plus environmental and biological samples all contaminated with sarin gas. In fact, a whopping 85 percent of blood and urine samples from survivors all contained the deadly gas.
The U.S., Britain, and France say all the evidence from the U.N. report indicates the Assad regime is responsible for the attack.
Russia, however, says it's not convinced and insists the new Security Council resolution should not allow the use of force in Syria.
The U.N. report comes after the United States struck a deal with Russia to dismantle Syria's chemical weapons, a move criticized by several Republican senators.
On NBC's "Meet the Press," Sen. John McCain, R-Ariz., called the agreement "meaningless."
"It's a laudable goal, but there's no real way to achieve it," he said.
Meanwhile, a car bomb exploded in a rebel-controlled post along the Turkey border, leaving at least 15 people wounded. Rebels are asking for swift international response.
France and the United States say military action is still on the table.