Russian forces begin pulling out of Syria after a six-month military campaign supporting President Bashar al-Assad's government.
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.
Russia's President Vladimir Putin "probably" approved the fatal poisoning of former Russian agent Alexander Litvinenko with radioactive polonium in London in 2006, a public inquiry has found.
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.
Russian President Vladimir Putin describes Turkey's downing of a Russian warplane as a "stab in the back", while Nato holds an extraordinary meeting to discuss the incident.
Turkish fighter jets shoot down a Russian warplane near the Syrian border after it allegedly violated Turkey's air space.
Islamic State has published a picture of what it claims is the bomb used to blow up a Russian passenger plane over Sinai, killing all 224 people on board.
The Kremlin dismisses allegations that Russian athletes engaged in widespread, state-sponsored doping that sabotaged the London 2012 Olympic Games.