According to Hürriyet:
The head of Israel’s Mossad, Tamir Pardo, met secretly with the Turkish intelligence agency’s undersecretary, Hakan Fidan, on June 10 in Ankara, with Syria and Iran on the agenda.One of the points on the meeting subjects:
The sources also claimed to have information that Iranian Revolutionary Guards and the Syrian intelligence unit, al-Mukhaberat, are working against Turkey.Mighty interesting, even if it's unclear who has this info - the sources or the one of the two men in that meeting.
All other media sources refer to this Hürriyet piece. For the moment, at least.
P.S. Whatever the rank of undersecretary means, Hakan Fidan is the chief of Turkish National Intelligence Organization (MİT).