Syria's chemical weapons are still secure despite the fact that President Bashar al-Assad has lost control of parts of the country, a senior Israeli defense official said on Sunday, Dec 23.

According to Reuters, Amos Gilad told Army Radio that the civil war between Assad and opposition forces fighting to topple him had become deadlocked, but that the Syrian leader showed no signs of heeding international calls to step down.

"Suppose he (Assad) does leave, there could be chaos ... in the Middle East you never know who will come instead. We need to stay level-headed; the entire world is dealing with this. At the moment, chemical weapons are under control," Gilad said.

As Syria's southern neighbor, Israel has been concerned about chemical weapons falling into the hands of Islamist militants or Lebanese Hezbollah fighters, warning it could intervene to stop such developments.

Western countries said three weeks ago that Assad's government might be preparing to use poison gas to repel rebel fighters who are encamped around Damascus, the capital, and who control rural Aleppo and Idlib in the north.

"The opposition is not managing to defeat him and he is not defeating the opposition, though more and more parts of Syria are no longer under his control and that is what matters," Gilad said.