There is much reason to believe, but obviously no hard evidence to prove, that Israel is behind the most recent assassination of yet another high-ranking Iranian scientist.
Mohsen Fakhrizadeh, who was seen by United States and Israeli intelligence services as the mastermind of a covert Iranian programme to develop nuclear weapons capability, was evidently killed on November 27 in an ambush on a highway near Tehran “with remotely controlled smart devices”.
https://www.aljazeera.com/opinions/2020/12/9/what-is-israels-secret-weapon-against-iran/