Turkey has challenged Russia to prove its claim that Ankara shot down a Russian plane in order to protect its oil trade with Islamic State (IS).
“If you allege something you should prove it,” Turkish President Recep Tayyip Erdogan said.
He was responding to a statement by Russia’s President Vladimir Putin. Russia says Turkey downed the jet as it was flying over Syria.
Turkey says the plane entered its airspace and was warned to leave.
One Russian pilot was killed and the other rescued after Russia’s Su-24 bomber was shot down by a Turkish F-16 fighter on the Syrian border on 24 November.
A Russian marine was killed during the rescue operation in north-western Syria.