A truce in the Syrian city of Aleppo has been extended for three days to "prevent the situation from worsening", the Russian defence ministry says.
The Syrian army announced a two-day truce on Wednesday, after two weeks of clashes left nearly 300 civilians dead.
The truce is part of international efforts to build on a wide-ranging ceasefire introduced in February.
Russia has been supporting its allies in the Syrian government with air strikes since September 2015.
Aleppo, in north-west Syria, was the country's industrial and financial centre before the five-year civil war started.
The recent violence there has been the worst phase of the war in the city for more than a year.