Turkey has released audio which it says confirms that its military did warn a Russian jet that it was entering Turkish airspace before it was shot down.
In the clip, obtained by FOX News Turkey, a voice can be heard speaking in English and Turkish.
"This is Turkish air force speaking, en garde," it says. "You are approaching Turkish air space. Change your heading south immediately."
The audio appears to contradict earlier claims by the surviving Russian pilot that no warning had been given, and that the plane was at no point in Turkish airspace.
The airman - who was extracted from rebel territory after a 12 hour operation by Russian and Syrian special forces - has said he could not possibly have flown over Turkish airspace, TASS newsagency reported.
His revelations will further fuel a row between Turkey and Russia with both countries saying the other was in the wrong.
When the pilot was asked if he could have strayed into Turkish territory as Turkey claims, TASS reported that Captain Konstantin Murakhtin told Rossiya One TV channel: "No, this is out of the question even for a one-second possibility, as we were at the altitude of 6,000 meters and the weather was clear".
"There were no warnings either via radio communication or optically. There were no contacts at all. That's why we flew heading combat course as per normal," he said.
"If they wanted to warn us they could have come out by flying on parallel courses. But this did not happen".
"And the missile came to our jet tail all of a sudden...We didn't even see it to have time for missile evasive maneouvre".
The Russian ambassador to France claimed the other airman - presumed to be the pilot - was wounded as he parachuted down and killed on the ground by "jihadists in the area".
Russian President Vladmir Putin said the engineer and the dead pilot would be given State awards.
A US official who spoke to Reuters claimed overnight that the Russian jet's heat signature showed it was hit inside Syrian airspace when it was shot down after briefly entering Turkish airspace - agreeing with Russia's analysis.
But Turkey's president Recep Tayyip Erdogan has repeated Turkey's claim that the jet was in Turkish airspace at the time it was hit in direct contradiction of the US analysis.
Turkish foreign minister Mevlut Cavusoglu spoke on the phone with his Russian counterpart Sergei Lavrov as the row over whether the jet was shot in Turkey or Syria went on. Turkey said they agreed to meet but Russia denied this.
Michael Stephens is a Middle East researcher and head of the Royal United Services Institute in Qatar. He spoke to Newstalk Breakfast earlier about the incident.
Turkey's prime minister Ahmet Davutoglu said Turkey has a "right and duty" to defend its aerial borders if they are violated.
Russia, meanwhile, carried out 12 airstrikes in Syria close to the Turkish border, bombarding rebel forces in the area including Turkmen militants, the British-based Syrian Observatory for Human Rights said.
Russia's President Putin on Wednesday accused Turkey's leadership of deliberately supporting Islamification in its country, and prime minister Dimitri Medvedev accused Turkey of allowing the "protection" of IS militants by its actions.
Russia said it was sending its S-400 missile system to Syria to defend its airbase.
Mr Lavrov said while Russia did not intend to wage a war against Turkey, it viewed the downing as a planned act and Moscow would "seriously reconsider" its relations with Ankara.
