If the plane crashed at Latakia, then it is nearly 40km inside Syria, which would tend to cast doubt on claims it was violating Turkish airspace.
If you google maps Yamadi, Latakia (the closest thing to the site apparently) it's right on the border with Turkey. Turkey's border is anything but a straight line down there though.
It's probably close enough to the border that we can't tell from the crash location which airspace it was in when it got hit.
Meanwhile, Russian media actively discussing the possibility of the plane coming down from a MANPAD while Turkey has been saying it did it all along
