WASHINGTON (AP) — President Barack Obama says a US -Russian agreement offers a chance to destroy Syria’s stockpile of chemical weapons and promises to end the threat they pose to Syrians and the world.

But the two powers are divided over the fate of Syrian President Bashar Assad. Obama, speaking in a television interview taped before Saturday’s announcement of the chemical weapons deal, said Russian President Vladimir Putin is “protecting” Assad and doesn’t share American “values” in Syria.

“He has a different attitude about the Assad regime,” Obama told ABC’s This Week.

“But what I’ve also said to him directly is that we both have an interest in preventing chaos, we both have an interest in preventing terrorism. The situation in Syria right now is untenable. As long as Mr Assad’s in power, there is going be some sort of conflict there.”

Obama’s interview was taped Friday and aired yesterday.

Despite Obama’s calls for Assad to leave power, Obama reiterated that he would not use military force to achieve that objective. He said securing Syria’s chemical weapons is his “primary concern”.

In setting out one of the most ambitious arms-control efforts in history, the US and Russia reached an agreement to inventory Syria’s chemical weapons programme and seize all its components. The agreement includes imposing penalties if the Assad government fails to comply.

In a written statement following the agreement, Obama said the world expects Syria to live up to its public commitments to hand over its chemical weapons stockpile. Warning that the US was prepared to act if Syria falls short, he also cautioned that more work remains even after the progress the deal represents.

The US and others blame Assad’s government for an August 21 gas attack in the suburbs of Damascus, the Syrian capital. Assad denies the charge, blaming Syrian rebels.

Polls showed relatively little support among Americans for a military strike against Syria, even after the Obama administration’s efforts to argue that punishing the Assad government for violating international norms of warfare was in the security interests of the US

Obama ordered preparations for American airstrikes, but he decided instead to ask for authorisation from Congress for military action. Then came the Russian proposal for international control of Syria’s chemical weapons, and Obama asked Congress, already largely opposed to military intervention, to delay a vote.

The deal to destroy Syria’s chemical weapons also offers the potential for reviving international peace talks to end a civil war that has claimed more than 100,000 lives and sent two million refugees fleeing for safety, and now threatens the stability of the entire Mideast.