A war plane crashing in flames in a mountainous area in northern Syria after it was shot down by Turkish fighter jets near the Turkish-Syrian border, is seen in this still image taken from video November 24, 2015 (Reuters)
Turkey's Foreign Ministry says it has summoned the Russian ambassador after a Russian jet violated Turkey's airspace on Friday, despite several warnings.
A Foreign Ministry statement on Saturday said the plane was warned in Russian and in English before entering Turkey's airspace.
The statement accused Russia of escalating tensions and said Russia would be held responsible for any "dire" consequences.
In November Turkey shot down a Russian plane which violated its airspace near Syria, touching off a crisis between the two countries.