Abbas Araghchi says he relayed his message in a phone call with Russia’s foreign minister, Sergey Lavrov.
In a social media post, Araghchi gave no indication as to what Iran will do after the ceasefire expires Wednesday or whether Iran will return to a second round of negotiations with the U.S.
He says his country “will monitor the behavior of the other side and take the appropriate decision to protect its interests and national security.”