Russia seeks "honest cooperation" for a political solution in Syria, Foreign Minister Sergei Lavrov said on Wednesday as Moscow declared a brief truce in the war-ravaged city of Aleppo.
"We hope our partners will draw (the) necessary conclusions (so that) we will all aim for honest cooperation... for a political process involving both the government and opposition forces," Lavrov said at the start of an official visit to Greece.
However, he insisted that Washington help enforce a United Nations Security Council resolution condemning support for extremist groups in Syria.
"When we adopted this resolution, I remember US Secretary of State John Kerry's words. He said: 'Whoever wants to be part of (the political) process must sever links to terrorists'," Lavrov said through a translator.
"Almost a year has passed and we await these words to be carried out," he added.
Russia has accused the US-led coalition of failing to rein in hardline Syrian rebels, warning that the chances of a political settlement to the crisis was now remote.
In turn, the West has accused Moscow of committing possible war crimes in Aleppo through indiscriminate bombing to support a brutal Syrian government offensive.
Moscow has been conducting a bombing campaign in Syria in support of long-time ally Bashar al-Assad since September 2015.
More than 300,000 people have been killed since Syria's war devolved from a widespread protest movement against Assad's rule in March 2011 to a multi-front war between rebels, Islamist militants , Kurds and regime forces.