U.S. President Barack Obama said on Wednesday that Russia had to shift its focus from propping up Syrian President Bashar al-Assad and concentrate on the war against Islamic State.
Speaking just hours after President Vladimir Putin vowed to hunt down those responsible for blowing up a Russian airliner and intensified air strikes against militants in Syria, Obama said it was a fitting response.
"If in fact he shifts his focus and the focus of his military to what is the principal threat - and that is ISIL (Islamic State) - that is something that we very much want to see," Obama said on the sidelines of the Asia-Pacific Economic Cooperation (APEC) summit in Manila.
"That's not how they've been operating over the last several weeks. It may be that now having seen ISIL take down one of their airliners in a horrific accident, that reorientation continues."
Obama said he had held repeated discussions with Putin last weekend at the G20 summit in Turkey and earlier at the United Nations in New York. More talks would be held with Moscow, he said.