Late yesterday Turkey (a NATO member) shot down a Russian jet, either inside its airspace (Turkey claims) or over Syria (Russia claims). The Guardian:
Turkey downs Russian warplane near Syria border
Turkish military official says fighter jets destroyed plane after it violated country’s airspace, which Russia denies
Nato-member Turkey has shot down a Russian warplane in the first time the alliance and Moscow have come to blows directly over the crisis in Syria.
Ankara and Moscow gave conflicting accounts of the incident, which appears to have occurred in an area near the Turkish-Syrian border straddling Iskenderun and Latakia.
The Turkish military said it scrambled two F-16 fighter jets after a plane penetrated Turkish airspace in the province of Hatay at 9.20am on Tuesday morning, warning it to leave 10 times in five minutes before it was shot down.
It was unclear if the plane was shot down by the fighter jets or by ground-based defence systems.
Russia’s defence ministry, in a series of tweets, confirmed a Russian SU-24 had been shot down, but insisted the plane had never left Syrian airspace. …
BREAKING: Russian official confirms jet downed by Turkish Air Force is Russian and that this marks 'dangerous escalation'.
— The Int'l Spectator (@intlspectator) November 24, 2015
Russian TV is completely ignoring Turkish claims they shot it down, focusing on western hypocrisy, failure in Syria, giving rebels weapons.
— Shaun Walker (@shaunwalker7) November 24, 2015
— AirLive.net (@airlivenet) November 24, 2015