The prince also said in the interview, with a Saudi broadcaster, that “we won’t wait for the battle to be in Saudi Arabia.”
“Instead,” he continued, “we’ll work so that the battle is for them in Iran.”
It was that remark in particular that appeared to anger the Iranians.
“While categorically rejecting the baseless allegations against my country, I wish to underline that his statement reflects an unveiled threat against the Islamic Republic of Iran,” Mr. Khoshroo’s letter said.
He called it a violation of Article 2 of the United Nations Charter, which requires all members to “refrain in their international relations from the threat or use of force against the territorial integrity or political independence of any state.”
Mr. Khoshroo further accused the Saudis of complicity in “acts of terror and violence inside Iran,” including the killing of 11 Iranian border guards last month in a southeast part of the country unsettled by a Baluch separatist group known as the Army of Justice.
“This blatant threat and admission is being made by a regime with a long record of supporting aggression and using terrorist and extremist groups for its shortsighted and dangerous ambitions in the region and beyond,” the letter said.