Russian President Vladimir Putin and US President Barack Obama have agreed to intensify diplomatic and other co-operation to implement an agreement on Syria, the Kremlin says.
Major powers agreed on Friday to a temporary "cessation of hostilities" in Syria. The pause is due to begin in a week's time.
After phone talks between Putin and Obama on Sunday, the Kremlin said both gave a "positive valuation" to the meeting on Syria in Munich on February 11-12.
"In particular, a support was expressed to efforts of two target groups: for ceasefire and humanitarian aspects," the Kremlin said.
Kremlin added that during the talks, the need to establish close working contacts between Russia's and US defence ministries was underlined, which would allow them to "successfully fight the Islamic State and other terroristic organisations".
The Kremlin also said Putin spoke with Obama about the importance of creating a united anti-terrorism front. They also discussed the situation in Ukraine, the Kremlin said.