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He said the assassination of his country’s ambassador to Turkey was “clearly a provocation” and vowed vowed to make those responsible “feel the heat”.

Mr Putin said this evening: “This murder is clearly a provocation aimed at undermining the improvement and normalisation of Russian-Turkish relations as well as undermining the peace process in Syria promoted by Russia, Turkey, Iran and other countries interested in solving this conflict in Syria.

"The only response we should offer to this murder is stepping up our fight against terror.