Hezbollah leader Hassan Nasrallah’s death has prompted Iranian authorities to thoroughly investigate possible infiltrations within Iran’s own ranks, quotes an Irani official as saying. They are especially focused on those who travel abroad or have relatives living outside Iran, another official said. Tehran grew suspicious of certain members of the Guards who had been travelling to Lebanon, he said. Concerns were raised when one of these individuals began asking about Nasrallah’s whereabouts, particularly inquiring about how long he would remain in specific locations, the official added. The individual has been arrested along with several others, the first official said, after alarm was raised in Iran’s intelligence circles. The suspect’s family had relocated outside Iran, the official said, without identifying the suspect or his relatives. Simultaneously, in Lebanon, Hezbollah began conducting a major investigation to purge Israeli spies among them, questioning hundreds of members after the pager detonations, three sources in Lebanon told .