Was there anything heard from Israel? Can hardly imagine that they do not permanently, carefully and accurately monitor this airspace, which is just across the border that was a battlefield may times in the past.
If they did (monitor) they could at least line out some versions discussed
Yes they are involved
IDF coordinating with Russia, Egypt to help locate felled Russian plane in Sinai - Breaking News - Jerusalem Post
Benjamin Netanyahu: We are in contact with Egyptian, Russian governments regarding circumstance of crash - Breaking News - Jerusalem Post