"It is early to comment about the cause of the recent incident in Natanz nuclear site, the relevant authorities are investigating the accident in detail and will announce the cause of the incident even if foreign elements have been involved in the case," Mousavi said, as quoted by Tasnim.
These actions will have consequences, the spokesman added.
On 2 July, a major explosion hit Iran’s Natanz facility for enriching uranium. The official explanation is yet to be named. According to various news outlets, the blast could be an act of sabotage conducted by Israel.
No casualties or leaks of radioactive materials from the nuclear facility have been reported.
Earlier in the day, the Iranian authorities denied reports on another alleged explosion, occurred in the western part of the Tehran province, particularly in the city of Qods, late on Thursday.
