Ukraine is concerned that Putin's intervention in Syria could see the EU and US end Russia sanctions as part of a new alliance to fight the Islamic State (IS) group.
But Western diplomats and analysts say it is not so simple.
Russian leader Vladimir Putin will on Monday (28 September), in a speech at the UN assembly in New York, propose the creation of a new “co-ordinating structure” to fight IS and to mitigate the refugee crisis.
He will, the same day, meet US leader Bar...
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