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.
Syria will dominate a meeting of the UN general assembly in New York, with Russia pressing other countries to unite against Islamic State.
Syrian President Bashar al-Assad says he would consider a coalition against Islamic State, but this would be unlikely to include those backing rebel groups in his country.
The death toll from Syrian government air strikes on a market in an under-siege area of Damascus passes 100, making it one of the bloodiest attacks of the four-year war.
Barrel bombs, indiscriminate weapons responsible for the deaths of 11,000 civilians in the Syrian civil war, are the increasing weapons of choice of the Assad regime.
Turkey's AK party has lost its majority at a general election after 13 years in government - a blow to President Recep Tayyip Erdogan, who was seeking to cement his grip on power.
A Manchester chemistry teacher whose family hid his passport to try and stop him from going to Syria has been jailed for six years for planning to fight with Islamic State.