The Free Syrian Army rejected any claim that it could have or use chemical weapons. "We do not plan, own, or have the capability to use chemical weapons against our own people," said political and media coordinator Louay Almokdad.

Another view on weapons

Fears of chemical weapons use by the Syrian government are "hysterical hype," former U.S. National Security Adviser Zbigniew Brzezinski said Saturday.

Speaking with CNN's Randi Kaye, Brzezinski said it does not make sense that the Syrian regime would employ such weapons when doing so would in effect poison its own people.

The fighting in Syria is not along traditional fronts, but sporadic outbreaks of fighting, making chemical weapons not very effective, he said.

"It's more like a guerrilla warfare. How do you use chemical weapons against that," he said.

The real challenge, Brzezinski said, is creating a stable situation in Syria so the conflict does not spill into Jordan, Lebanon or Iraq.