answer has just come to light. It appears as though Israel's Mossad spy agency has been training men from the Iranian dissident group the People’s Mujahedin of Iran, or MEK. The MEK originally played a key role in the Iranian Revolution in 1979 when Ayatollah Khomeni overthrew the Shah. They eventually split with the regime and have been waging a low-grade campaign of attacks and bombings against it for over 15 years. The MEK are officially a terrorist group, but as it is obviously difficult for Israeli agents to gain access to Iranian society, the Mossad has been training the MEK in its bombing and assasination techniques. The MEK are certainly not moderates, but it appears that the Israelis and the MEK are acting based on the old principle that "the enemy of my enemy is my friend." Do read the article referenced above, it provides an excellent overview of this entire relationship.