CROWN PRINCE Muhammad Bin Salman, deputy premier and minister of defense, has denounced Iran's supreme leader Ayatollah Ali Khamenei as the "new Hitler of the Middle East", as tensions simmer between the regional rivals.

Saudi Arabia and its arch-rival Iran have traded a bitter war of words after a missile fired from Yemen was intercepted near Riyadh airport on Nov. 4. The missile was claimed by Yemen's Tehran-backed Houthi rebels.

Iran's "supreme leader is the new Hitler of the Middle East", Crown Prince Muhammad told The New York Times in an interview published Thursday.

"We learned from Europe that appeasement doesn't work. We don't want the new Hitler in Iran to repeat what happened in Europe in the Middle East."

Tehran has strongly denied supplying any missiles to the rebels, and President Hassan Rohani has warned Saudi Arabia of Iran's "might".

The spike in tensions coincides with Prince Muhammad's new anti-corruption purge, which saw around 200 elites including princes, ministers and business tycoons arrested or sacked earlier this month.

The Crown Prince described as "ludicrous" reports equating the crackdown to a power grab, saying that many of those detained at Riyadh's opulent Ritz-Carlton hotel had already pledged allegiance to him.

"A majority of the royal family" is behind him, the prince said, dismissing longstanding rumors of internal opposition to his meteoric rise.

He said 95 percent of those detained agree to a "settlement", or handing over ill-gotten gains to the Saudi state treasury.

Saudi Arabia's attorney general estimates at least $100 billion has been misused in embezzlement or corruption over several decades.

Authorities have frozen the bank accounts of the accused and warned assets related to the alleged graft cases would be seized as state property, in what they describe as a top-down approach to battling endemic corruption.

"About one percent are able to prove they are clean and their case is dropped right there. About four percent say they are not corrupt and with their lawyers want to go to court," the Crown Prince said.

"We have experts making sure no businesses are bankrupted in the process," he added. — Reuters