US President Barack Obama and Russian President Vladimir Putin discussed the war in Syria and Russian involvement in Ukraine in a telephone call before Obama heads to the NATO summit this week in Warsaw.
Putin called on Obama to draw a clear line between the moderate Syrian rebels and extremist groups, the Kremlin says. Obama called for Putin to do more to pressure the Syrian regime, a Moscow ally, to abide by a cessation of hostilities agreement, the White House says.
Russia's involvement in Ukraine is among the chief concerns at the NATO summit, and Obama urged Putin to halt a "significant uptick" in fighting in eastern Ukraine and to abide by the Minsk agreement, the White House says.
The two presidents discussed Putin's meeting last month with the leaders of Azerbaijan and Armenia about the conflict in Nagorno-Karabakh, and Obama expressed willingness to intensify efforts to reach a peace agreement.