This story appears as an opinion piece by David Ignatius in the Washington Post.
The story goes that at the height of the fall-out between Turkey and Israel, Turkey disclosed the identities of ten Iranians who were working with Mossad to Iran.
Here's the first two paras...
"...The Turkish-Israeli relationship became so poisonous early last year that the Turkish government of Prime Minister Recep Tayyip Erdogan is said to have disclosed to Iranian intelligence the identities of up to 10 Iranians who had been meeting inside Turkey with their Mossad case officers.
Knowledgeable sources describe the Turkish action as a “significant” loss of intelligence and “an effort to slap the Israelis.” The incident, disclosed here for the first time, illustrates the bitter, multi-dimensional spy wars that lie behind the current negotiations between Iran and Western nations over a deal to limit the Iranian nuclear program. A Turkish Embassy spokesman had no comment..."
More recently, Turkey has denied the reports.
Here's the last para of the piece, a take on regional implications...
"... The Netanyahu-Erdogan quarrel, with its overlay of intelligence thrust and parry, is an example of the kaleidoscopic changes that may be ahead in the Middle East. The United States, Israel, Iran, Saudi Arabia and Egypt are all exploring new alliances and struggling to find a new equilibrium — overtly and covertly. ..."