At the APEC summit in Manila, US President Obama said Russia had been a "constructive partner at the international talks in Austria’ where the international community ‘is trying to create a political transition in war-torn Syria’, reports BBC.

But, he said, there were still differences between Washington and Moscow over the fate of Syrian ruler Bashar al-Assad who is not in control of most of the country at the moment.

“In their initial military incursion into Syria, they have been more focused on propping up President Assad (since September 30 when Russian jets started launching strikes on Syrian opposition)”, said the US President.

During the talks which were held earlier in Austria, Obama expressed hope that Russia ‘shifts [its] focus and the focus of [its] military, to what is the principle threat, which is ISIL’.