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By Denis Pinchuk and Elizabeth Pineau MOSCOW (Reuters) - Russia will keep cooperating with the United States and its partners to fight Islamic State in Syria, but that cooperation will be in jeopardy if there are any repeats of Turkey's shooting down of a Russian jet, Russia's Vladimir Putin said. 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.
By Humeyra Pamuk and Vladimir Soldatkin ISTANBUL/MOSCOW (Reuters) - Russia threatened economic retaliation against Turkey on Thursday and said it was still awaiting a reasonable explanation for the shooting down of its warplane, but Turkey dismissed the threats as "emotional" and "unfitting." In an escalating war of words, President Tayyip Erdogan responded to Russian accusations that Turkey has been buying oil and gas from Islamic State in Syria by accusing Syrian President Bashar al-Assad and his backers, which include Moscow, of being the real source of the group's financial and military power. The shooting down of the jet by the Turkish air force on Tuesday was one of the most serious clashes between a NATO member and Russia, and further complicated international efforts to battle Islamic State militants.