They're brandishing guns, smiling and posing in front of posters showing Presidents Assad and Putin. But who exactly are the Russian soldiers and fighters posting pictures of themselves inside Syria?
The presence of Russian soldiers in Syria is nothing new. As long ago as 1971, Moscow leased a small naval installation in the Mediterranean port city of Tartus. But as talk of further Western strikes against Syrian targets increases, there's been intense speculation that Russia will now go beyond just training President Bashar al-Assad's forces. Indeed some people already think there's evidence that Russian troops are fighting on the ground, although there's no hard evidence of that so far.