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.
The body of a pilot killed when Turkey shot down a Russian jet last week is now in Turkey's hands, Prime Minister Ahmet Davutoglu has said.
The body will be handed over to Russia at Moscow's request, he said.
He added that the issue of different coalitions operating in Syria with differing objectives meant similar incidents could happen in the future without improved information sharing and coordination.
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.