Russia rejects Turkish claims is has committed "an obvious war crime" following the deaths of up to 50 people in bombing attacks on hospitals and schools in Syria.
A medical team is on its way to the besieged Syrian town of Madaya, where 32 people are reported to have died of starvation in the last month and children are suffering from severe malnutrition.
Food aid is expected to arrive by Monday in the besieged Syrian town of Madaya, where some people are starving to death, but the UN warns that the situation is also dire in other parts of the country.
Russia's defence ministry says it has proof Turkish President Tayyip Erdogan and his family are involved in the illegal smuggling of oil from Islamic State-held territory in Syria and Iraq.
We have arrived at a crossroads. Few can have believed that the bloody killings of Charlie Hebdo's staff would be the end of it.
Syrian President Bashar al-Assad flies to Moscow to thank Russian Vladimir Putin in person for his military support.
Russia says the shelling of its embassy in the Syrian capital was an "act of terrorism" designed to intimidate "supporters of the fight against terrorism".
Nato rejects Russia's explanation that its incursion into Turkish air space was a mistake and says Moscow is sending more ground troops to Syria.
President Bashar al-Assad says only Russia, Syria and its allies can decide the fate of the Middle East, and that terrorism has actually spread as a result of the US-led airstrikes.