The pilot of the Russian warplane that was shot down on Tuesday is claiming that Turkey did not provide any sort of warning before opening fire on the aircraft, according to reports.

Captain Konstantin Murakhtin is also claiming that the plane never crossed into Turkey’s airspace, though this claim has been disputed by NATO and United States military officials.

Murakhtin spoke to reporters a Russian air base in northern Syria on Wednesday, a day after he and the aircraft’s other pilot ejected from the aircraft that was shot down near the Syrian border. He was rescued after a half-day operation that involved using special forces, the BBC reported.

The other Russian pilot was killed.

Murakhtin told RT, a Russian television network, that the pilots did not receive a verbal or visual warning before a Turkish plane opened fire and hit their aircraft with a missile. He also claimed he knew the area very well and it was “impossible that we violated their airspace.”

Turkish officials had said they warned the pilots 10 times in five minutes, the New York Times reported, and that the plane crossed a tiny piece of Turkish territory in about 17 seconds.

NATO, of which Turkey is a member, has backed Turkey’s version of the events. A senior United States military official, speaking to the New York Times, said the data indicated the Russian plane flew over Turkey. CNN reported Turkey released tapes of what it said were the warnings.

The back-and-forth nature of the claims were escalating tensions between the two nations.

Multiple countries have called for the situation to be de-escalated, according to reports, and officials from Turkey and Russia are both quoted as saying they want to avoid military conflict.

Yet the Russian defense minister announced the country will deploy missile defense systems to the air base in Syria. The missiles would be able to reach the Turkish border, CNN reported.