Syrian boys play with snow following a storm in the northern Syrian city of Aleppo on last week. Photograph: KAram Al Masri/AFP/Getty Images

Bombs dropped by suspected Russian warplanes killed at least 12 Syrian schoolchildren on Monday when they hit a classroom in a rebel-held town in Alep(...)

File photo: Russian president Vladimir Putin addresses the audience during an annual meeting at the defence ministry in Moscow, Russia, December 11th, 2015. The ministry said in a statement that a Russian destroyer had fired warning shots at a Turkish ship to avoid collision on Sunday. Photograph: Alexei Druzhinin/Reuters

The Russian defence ministry said on Sunday one of its warships, the destroyer Smetlivy, had been forced to fire warning shots at a Turkish vessel in (...)

Turkey will regret “more than once” its shooting down of a Russian bomber jet near the Syrian-Turkish border, Russian president Vladimir Putin said on Thursday. Photograph: Sergei Karpukhin/Reuters

Russia’s President Vladimir Putin called Thursday for a broad international front against terrorism and accused Turkey of trading oil with Islamic Sta(...)

Nato secretary general Jens Stoltenberg at  a press conference  in Brussels on Tuesday. “I will not speculate on the motives but this does not look like an accident,” he said. Photograph: Laurent Dubrule/EPA

Nato general secretary Jens Stoltenberg rejected claims by Russia that its incursion into Turkish airspace last weekend was accidental, amid claims t(...)

A frame grab taken from footage released by Russia’s Defence Ministry on Monday, shows airstrikes carried out by the country’s air force in Syria. Photograph: Reuters

Nato’s secretary-general has rejected Moscow’s claim that its military incursion into alliance airspace over Turkey was not intentional or important, (...)

A frame grab taken from footage released by Russia’s Defence Ministry on Saturday. Photograph: Reuters

Russian jets hit Islamic State targets and other rebel groups in Syria on Saturday, on a fourth day of air strikes by Moscow in support of president (...)

US secretary of defence Ashton Carter criticising Russian airstrikes in Syria during a press briefing at the Pentagon in Washington, DC, September 30th, 2015. Photograph: Saul Loeb/AFP/Getty Images

Russia launched air strikes in Syria on Wednesday in the Kremlin’s biggest Middle East intervention in decades, but Moscow’s assertion that it had hi(...)

Yevgeny Yerofeyev lies on a bed at a hospital in Kiev yesterday. Ukraine claims Yerofeyev is one of two Russian special forces soldiers captured in eastern Ukraine. Photograph: Roman Pilipey/EPA

Ukraine has denied it is preparing a prisoner swap that would see two alleged Russian special forces soldiers return home, after a separatist leader i(...)

Armed people and military trucks are seen near a checkpoint outside a building on the territory controlled by the self-proclaimed Donetsk People’s Republic in Donetsk, eastern Ukraine, November 12, 2014. Photograph: Maxim Zmeyev/Reuters

Ukraine said on Wednesday it was redeploying troops in the east because of fears that separatists will launch a new military offensive, despite Russia(...)

Much of the fighting in eastern Ukraine has been on the border with Russia, which Ukrainian government forces want to safeguard to prevent any influx of fighters and military hardware from Russia. Photograph: Roman Pilipey/EPA

Nato secretary general Anders Fogh Rasmussen and Ukrainian prime minister Arseny Yatseniuk discussed possible Western alliance support for Ukraine’s d(...)