(CNN) US Secretary of State Mike Pompeo said Tuesday that President Donald Trump could meet with Iranian President Hassan Rouhani at the upcoming United Nations General Assembly, with "no preconditions."

The comments, made by Pompeo during a press briefing to announce a raft of new sanctions on groups including a unit in Iran's Islamic Revolutionary Guards, came just hours after Trump announced the resignation of national security adviser and Iran hawk John Bolton

Asked about the possibility of a meeting between Trump and Rouhani later this month, Pompeo, who was speaking alongside Treasury Secretary Steven Mnuchin, said that Trump was "prepared to meet with no preconditions."

Both Trump and Rouhani are scheduled to attend the UN General Assembly in New York late September.

Mnuchin maintained that even with Bolton now out of the picture, the US would continue with its "maximum pressure" campaign against Iran. The policy aims to stop Iran from developing nuclear weapons through economic and military pressure , including sanctions , following Trump's withdrawal from the Iran nuclear deal last year.