Araghchi says that the US and Israel have crossed "a big red line" with the attacks on the nuclear energy facilities.
Araghchi and Putin will meet tomorrow Monday to "consult".
On Sunday, there will also be condemnations from the Russian Foreign Ministry, which calls the US attacks "irresponsible" and "a gross violation of international law".
"It is clear that a dangerous escalation has begun", says the Foreign Ministry in a statement.
At the same time, the former Russian President Dmitry Medvedev writes on Telegram that he condemns the US attacks and accuses the American President Donald Trump of starting a new war.
"Good start, congratulations Mr President", writes Medvedev.
