Russia and the United States agreed on Monday to look for a diplomatic end to the Syrian civil war but clashed over the central question of whether Syrian President Bashar al-Assad should retain power.
During a 90-minute meeting, U.S. President Barack Obama and Russian President Vladimir Putin agreed that their armed forces should hold talks to avoid coming into conflict in Syria after a Russian military buildup there over the last several weeks.
The United States, France and allied countries are bombing Islamic State militants, who have exploited power vacuums to seize parts of Syria and neighboring Iraq as part of a stated goal of creating an Islamic caliphate.
The reinforcement of the Russian military presence in the country, including the addition of tanks and warplanes, has brought fears of inadvertent or accidental clashes among the forces as well as U.S. questions about Moscow's main goal.
Speaking after his meeting with Obama, Putin told reporters Russia was pondering what more it could do to support Syrian government and Kurdish forces against Islamic State militants.
"We are mulling over what we would really do extra in order to support those who are in the battlefield, resisting and fighting with terrorists, ISIS (Islamic State) first of all," Putin said, ruling out deploying Russian ground troops.
"There is (an) opportunity to work on joint problems together," Putin said of his talks with Obama, which a U.S. official described as "businesslike."