The US hit out at Iran's supreme leader Ayatollah Ali Khamenei after he said in a tweet that "Western powers are a mafia. At the top of this mafia stand the prominent Zionist merchants, the US is their showcase, and they’re spread out everywhere.

US denounces Khamenei over Zionist merchants, mafia remark

Iran's supreme leader vowed on Thursday that his country would ramp up the development of its civilian nuclear program, as major world powers continued delicate talks in Vienna to revive Tehran's landmark nuclear deal.

Iran supreme leader Khamenei urges nuclear energy progress amid talks

Iran's supreme leader opened a presidential election Friday in which ultraconservative cleric Ebrahim Raisi is seen as all but certain to coast to victory over his vetted rivals.

Iran opens presidential vote, with ultraconservative tipped to win

Iran's supreme leader Ayatollah Ali Khamenei may have transferred power to his son, according to reports. The leader reportedly did this because of his declining health.

Why Khamenei's alleged transfer of power to son signals seismic change for Iran

The people of Iran face a sensitive time because of the pressure from America and economic problems, Supreme Leader Ayatollah Ali Khamenei said in a key address broadcast by state television on Thursday.

Iran faces sensitive time due to America, economic woes: Ayatollah Ali Khamenei 