We just received one information which states deface in a subdomain of forth.gr. THE σελίδα belongs to Foundation for Research and Technology (ITE) based in Crete.
It was founded in 1983 and is one of the largest and most well-organized research centers in the country, with international recognition and highly skilled staff.
However, as it seems, their page is "crashing". See below the image from deface.
The link that the (Turks) were able to hack hackers is http://contact.iceht.forth.gr/