Trump and Pompeo need to STFU about this until actual evidence is released. If Turkey has it, release it for evaluation and protection of their methods of spying on foreign embassies be damned. Every country does that and every country knows every country does it.
I would not trust Turkey at all but I would hardly be surprised that the leaders of the country that carried out 9/11 and has spread their terrorist doctrine would sanction this kind of butchery.
The reaction of the US and other allied governments will be dictated by money.
Saudi Arabia is now and always has been ruled by murderous scum butchers. Why would anyone be surprised they could do this. The only question I have is why do it in such a moronic manner, assuming they did as the Turks claim, that was doomed to be exposed.