US President Donald Trump's announcement on Twitter that he removed his national security adviser John Bolton caught many by surprise in Iran. As with most Iranian reactions to developments in US politics, the official response has been cautious. Still, excitement could be read between the lines.

President Hassan Rouhani addressed Bolton's removal by advising the US government to "come to the understanding that warmongering and warmongers do not serve a purpose." He also called on Washington to abandon its "maximum pressure" policy.

"We do not make comments on the internal affairs of the United States," said Foreign Minister Mohammad Javad Zarif in his initial reaction when asked what he made of Bolton's removal. Later, however, tweeting criticism of a set of fresh US Treasury sanctions on Iran, Zarif was less diplomatic: "Thirst for war — maximum pressure — should go with the warmonger-in-chief." The Iranian foreign minister has seized every chance to write and speak against Bolton's anti-Iran policies, trying to sway world public opinion on what he viewed as efforts by Bolton to lure Trump into a military conflict against Iran. Zarif had also placed Bolton in the so-called B-Team of hawks, which also includes Israeli Prime Minister Benjamin Netanyahu, Saudi Crown Prince Mohammed bin Salman and United Arab Emirates Crown Prince Mohammed bin Zayed.

"Although the US arrogance and its hostile policies will not change with the ouster of one person, Bolton being fired is an indication of the failure of Trump's pressure campaign," tweeted Abbas-Ali Kadkhodaee, the spokesman for the conservative and powerful Guardian Council.