Turkey's President says that the downing of a Russian warplane near the Turkish/Syrian border was "fully in line with Turkey's rules of engagement".
President Recep Tayyip Erdogan says that his country's military made "all efforts to avoid" the incident, which saw Turkish F16 fighter jets engage and shoot down a Russian SU-24 warplane.
Mr Erdogan also condemned the bombing by Russia of Syrian Turkmens, saying the group are in an area where so-called Islamic State militants aren't present.
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.