Iraninfo-icon on Thursday lashed out at Saudi Crown Prince Mohammed bin Salman, calling him a "simple-mind" after the powerful young royal likened Iran's supreme leader to Adolf Hitler.

"These words are worthless ... because they come from a simple-mind full of illusions who speaks only bitterness and lies," said Iranian foreign ministry spokesman Bahram Ghasemi.

In an interviewinfo-icon with CBS television, parts of which were released Thursday, Prince Mohammed also said that if Tehraninfo-icon develops a nuclear weapon, Riyadh will follow.

"Saudi Arabiainfo-icon does not want to acquire any nuclear bomb, but without a doubt, if Iran developed a nuclear bomb, we will follow suit as soon as possible," the crown prince said.

Iran's supreme leader Ayatollah Ali Khamenei "wants to create his own project in the Middle Eastinfo-icon, very much like Hitler who wanted to expand at the time," said the 32-year-old heir to the throne.

Iran and Saudi Arabia are arch-rivals who back opposing sides in regional conflicts from Yemeninfo-icon to Syriainfo-icon.

Prince Mohammed's remarks were aired just days before he due to visit Washington for talks with U.S. President Donald Trumpinfo-icon.