A boy inspects his school, damaged in what activists said was an air strike carried out yesterday by the Russian air force in Injara town, Aleppo countryside, Syria January 12, 2016. REUTERS/Khalil Ashawi

MUNICH (Reuters) - A Western official said on Wednesday that Russia has made a proposal to begin a ceasefire in Syria on March 1, but the official said no agreement has been reached on the Russian offer.

The official said the United States has concerns about some elements of the Russian proposal.