The head of the United Nations' Atomic Energy Agency said President Donald Trump's strike against Iran's nuclear program caused "enormous damage" to the country's progress on Thursday. Questions about the effectiveness of Saturday's attack had simmered throughout the week.

US strikes caused "severe damage" to Iran's nuclear facilities after a leaked report downplayed the extent of the operation, CIA Director John Ratcliffe said on Wednesday. According to Ratcliff, key sites had been destroyed and would have to be rebuilt over the "course of years".

Tehran has criticised Rafael Grossi for rhetoric it believes helped pave way for strikes, mulling exit from NPT.