A factor residing in Iran.
"We are facing an existential war in the entire region. ".
"Iran is building on the nuclear umbrella of its partners."
(The meaning is that if the US attacks Iran with a nuclear weapon, Russia will attack Ukraine with a nuclear weapon).
In any case, the same source claims that Iran will be attacked nuclear by the US, the Iranian response will be an attack on nuclear facilities.
Abu Zaleh of the Arab desk