The killing of Hezbollah head Hassan Nasrallah has sparked questions about how Israel could suddenly locate leading figures within the Lebanese movement after years of searching, with suspicions falling on Iran’s intelligence. Mahmoud Ahmadinejad – who served as Iran’s president between 2005 and 2013 – believes his country’s intelligence services could have been infiltrated by Israeli agents from the very top, with secret information passed on to the Israeli government. This included an intelligence unit dedicated to rooting out Israeli spies in Iran, following attacks on nuclear scientists an…