Israel's Intelligence Minister, Eli Cohen, said on Monday in an interview with a radio station that he did not know who was behind the killing. However, an unnamed senior Israeli official involved in tracking Iranian nuclear activities was quoted by the New York Times as saying that "Iran's aspirations for nuclear weapons, promoted by Mr Fakhrizadeh, posed such a menace that the world should thank Israel". Machine guns and other remotely controlled ground weapons are now widely used across the Middle East, according to a report by Forbes. They are employed both by professional armies, such as those mounted on combat vehicles, but also by militants who are known to have put them in vehicles or stationary posts.