Canadian, British, German, Australian, Italian, Turkish, Saudi Arabian or from other suni neighbors. The list of those who oppose the Ayatollahs is quite long. Of course it could also be political killing by the Ayatollahs to cleanse dissidents and those who oppose their theocracy.
Several injured after Jerusalem protest march against Al-Aqsa restrictions dispersed (Haaretz)
from the article: TIMELINE / Mysterious deaths and blasts linked to Iran's nuclear program