Russia has announced a series of economic sanctions against Turkey after the downing of a Russian jet near the Syrian border.
Turkey said the sanctions "would only damage relations", after the country's Prime Minister said he was "truly saddened" by the incident.
Russia's newly announced economic sanctions against Turkey will only "deepen the problem" a senior Turkish official has said.
President Vladamir Putin ordered the sanctions in retaliation for Turkey downing a Russian jet near the Syrian border.
"Sanctions like this would only damage relations. These steps do not make anything easier, but deepen the problem," the official told Reuters.
Turkey has shown it is willing to take on Russia after downing a Russian fighter jet.
This incident will leave the American military profoundly alarmed that the Syrian conflict is now threatening to spiral out of all control.