US officials say an agreement is near between the US and Russia on how to resolve Syria's civil war once the Islamic State group is defeated.
The potential understanding for what happens next for Syria comes as an array of forces close in on the extremist group that once controlled vast stretches of Iraq and Syria.
Fighting the Islamic State group is no longer top priority, with the focus in Syria shifting back to its intractable conflict between President Bashar Assad's government and rebels. Another nagging concern is that foreign powers such as Iran will dominate the country's future.
Officials say the US-Russian agreement being discussed would focus on reducing violence in the civil war, reinvigorating UN-led peace talks, and preventing collisions or confrontations between US and Russian aircraft.