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.

But Turkish military officials said Turkish F-16s had shot down the plane after repeatedly warning its two crew they were violating Turkish airspace.The crew ejected before the jet crashed in Latakia province, but Syrian rebels said at least one was dead.

It is the first time a Russian aircraft has crashed in Syria since Moscow launched air strikes against opponents of President Bashar al-Assad in late September.