Germany said Friday's agreement to end hostilities in Syria must be put into action, putting the onus primarily on Russia which Berlin accused of scuppering peace talks through its military offensive, AFP reports.
"The words must be followed with deeds. And here the government puts Russia first under the obligation to do so," said Christiane Wirzt, government spokeswoman.
"Through its military action on the side of Assad's regime, Russia had recently seriously compromised the political process. Now there is a chance to save this process with the expectation that in the period before a full ceasefire, there would not be heightened attacks," she added.
The West has been trading barbs with Moscow over its bombing campaign in the opposition-held city of Aleppo, which observers say has killed 500 people since it began on February 1.