Eurocontrol says the following
Airports
Turkish situation.
Although the situation is unclear to the staff at Istanbul Ataturk and at Ankara ACC, our latest information is as follows:
Ataturk was open to international arrivals. However, due to the absence of departures since 2031 UTC, the airport is now full (no stands or parking spaces available).
Ataturk hope to re-commence international departures shortly, but until they do, all inbound flights to Ataturk are being diverted.
Ankara ACC say that they are operating normally.
Currently, there are NO REGULATIONS applied at any Turkish aerodromes, nor are there any enroute regulations applied.
Airspace
As above - no regulations applied in Turkish airspace.
NMOC Brussels