[4] Starting in 2005, IAEA gathered information from its member states indicating that Iran had launched in the late 1980s a plan aimed at the development of a nuclear explosive device.
This information indicated that these activities started within Departments of the Physics Research Centre (PHRC), and by the early 2000s came to be focused on projects of the Amad plan under the leadership of Mohsen Fakhrizadeh.
[4] In a 2015 report named Final Assessment on Past and Present Outstanding Issues regarding Iran’s Nuclear Programme, IAEA assessed that: On 31 January 2018, Israeli Mossad agents infiltrated a secret warehouse in southern Tehran, Iran, and pilfered 100,000 documents, including paper records and computer files, documenting the nuclear weapons work of the AMAD Project between 1999 and 2003.
According to Netanyahu, the documents proved Iran had lied to the international community about its plans, with the goal of the AMAD Project to design, produce and test five warheads, each with ten kiloton TNT yield for integration on a missile.
[8][9][10] Iranian Foreign Minister Javad Zarif tweeted to say the evidence was a "rehash of old allegations" which had already been dealt with by the International Atomic Energy Agency (IAEA).