Russian president agrees closer ties to defeat Islamic State but says any more ‘unacceptable’ incidents would mean ‘an end to cooperation with anybody’ Russia will pull out of the US-led coalition fighting Islamic State in Syria if there was any repeat of the shooting down of its fighter jet by Turkey, Vladimir Putin has warned.Speaking after talks in the Kremlin with French president Francois Hollande, Putin voiced lingering anger at Turkey’s actions, saying he viewed the downing of the jet as an act of betrayal by a country Moscow had thought was its friend.