I'm puzzled by media reports that the search seems to be focused on Karpathos, a Greek island to the ENE of Crete. The likely crash site, based on what we know from flight tracking sites, must be 250km or more SSE of there.
I'm sure there are folks out there who know where to look and are doing it right now - but at the risk of courting controversy, I don't trust the Greek or Egyptian authorities or the international media to provide reliable information.