U.S. President Barack Obama vowed on Sunday to step up efforts to eliminate Islamic State and prevent more attacks like those in Paris, while urging Russia's Vladimir Putin to focus on combating the jihadist group in Syria.
A White House official said Obama and Putin agreed in a 35-minute meeting on the sidelines of a G-20 summit in Turkey on the need for a political transition in Syria, saying events in Paris had made it all the more urgent.
The two-day summit brings Obama and fellow world leaders just 500 km (310 miles) from Syria, whose 4½-year conflict has transformed Islamic State into a global security threat and spawned Europe's largest migration flows since World War II.