in totalitarian regimes dictators and their secret service frequently assasinated their own scientist for a arnge of reasons: Scientist targeted may have expressed to some "close peopl" misgiivings aabout the ruling regime. They became unreliable who know too much and are assasinated. The shadows of the blame is then refocused on Irans foes like Israeli or American secret agents. Stallin did it quite often. This way fear of the Soviet regime was widespread. Another tool of oppression was to sentence scientist to gulag. Then use them to work on secret project like atomic reaserch and development. Famous Prof Ka;itsawas sentenced and headed the atomic weapon research in a special center for convicted sbcientist. Iranian regime is very likely to kill its scientist who know too much but are suspected of less than total loyalty to the Islamic regime. Israeli secret service is more likely trying to establish clandestine contacst with Iranian scientist to get secrets out. Iranian Islamic regime is under treat of its own young people who dislike Atatollahs. Hence, eventually the regime will collapse like inSoviet Union. Why would Mossad act to antagonize Iranian scientific society. They will eventally be free and have peacefull and friendly relations with Israel and Jews.
UN aid chief says no warring parties observed Yemen truce (Reuters)