Iranian Foreign Minister Mohammad Javad Zarif condemned assassination of Iran\'s nuclear scientists by Israel, and expressed concern about the indifference of the western countries, the US in particular, to this crime. In an interview with ABC\'s \"This Week\" program on Sunday, the Iranian top diplomat said, \"They (Israelis) have unfortunately assassinated some of them (the Iranian nuclear scientists), and no one has raised an eyebrow about it, which is a source of great concern to us. The United States supposed to be against terrorism is allowing terrorists to kill innocent Iranian scientists.\"   In June 2012, Iran announced that its intelligence forces have identified and arrested all terrorist elements behind the assassination of the country\'s nuclear scientists. \"All the elements involved in the assassinations of the country\'s nuclear scientists have been identified and arrested,\" Iran\'s Intelligence Ministry announced in a statement in June 2012. \"A number of countries, whose territories and facilities had been misused by the Mossad-backed terrorist teams, have provided the Iranian officials with relevant information,\" the statement added. \"Over the course of the investigations, all other elements behind the assassinations of the Iranian scientists Massoud Ali-Mohammadi, Majid Shahriari and Mostafa Ahmadi Roshan as well as Reza Qashqaei (Roshan\'s driver) have been apprehended,\" the statement read. \"Some of the perpetrators of the assassination of Dr. Fereidoun Abbasi, the current head of Iran\'s Atomic Energy Organization, are among those arrested,\" the ministry added. According to the statement, Iran\'s Intelligence Ministry had detected some of Mossad\'s bases within the territories of one of Iran\'s Western neighbors, which provided training and logistical support to the terrorist networks. In the fifth attack of its kind in two years, terrorists killed a 32-year-old Iranian scientist, Mostafa Ahmadi Roshan, and his driver on January 11, 2012. The blast took place on the second anniversary of the martyrdom of Iranian university professor and nuclear scientist, Massoud Ali Mohammadi, who was also assassinated in a terrorist bomb attack in Tehran in January 2010. The assassination method used in the bombing was similar to the 2010 terrorist bomb attacks against the then university professor, Fereidoun Abbassi Davani - who is now the head of Iran\'s Atomic Energy Organization - and his colleague Majid Shahriari. While Abbasi Davani survived the attack, Shahriari was martyred. Another Iranian scientist, Dariush Rezaeinejad, was also assassinated through the same method on 23 July 2011.