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 Turkish President has said he is "truly saddened" by his country's downing of a Russian military jet and wishes it had not happened.
It is the first time Recep Tayyip Erdogan has expressed regret over the incident.
He added he hoped something like this never occurs again and that neither country should allow the incident to escalate.
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.