The Turkish military has reportedly shot down a Russian military aircraft on the border with Syria.
Russia’s defence ministry said an Su-24 had crashed on Syrian territory after being hit by fire from the ground, and that its pilots had managed to eject.
But Turkish military officials said Turkish F-16s had shot down the plane after repeatedly warning its pilots they were violating Turkish airspace.
Video footage showed the plane crashing into mountains in Latakia province.
It is believed to have come down in a rebel-held area.
Russia launched an air campaign against opponents of Syrian President Bashar al-Assad’s government in late September.