Saudi Arabia informed Iran's military attache, his assistant and three members of the embassy staff that they must leave the kingdom within 24 hours after being declared persona non grata, the Saudi foreign ministry said on Saturday, citing what it described as continued Iranian attacks on Saudi territory.
Saudi Arabia has come under attack by hundreds of Iranian missiles and drones since the start of US-Israeli war on Iran, the vast majority of which have been intercepted, authorities said.
The ministry said in a statement that continued Iranian attacks would lead to further escalation and have "significant consequences" for current and future relations.
On Wednesday, the Saudi foreign minister said the kingdom reserved the right to act militarily against Iran and any trust with Tehran had been shattered following recent attacks.
Saudi Arabia and Iran re-established diplomatic ties in 2023 as part of an effort to calm tensions after years of enmity that saw them back opposing political and military factions in the region.
The US-Israeli war on Iran and Tehran's subsequent attacks on Gulf neighbours have disrupted oil and natural gas exports from the Middle East and forced production stoppages.
Iran said on Thursday it was reviewing Washington's latest position on ending the war after US President Donald Trump suggested he was prepared to wait a few days to "get the right answers" from Tehran but warned of renewed attacks if it did not agree to a deal.
United Nations Secretary-General António Guterres has strongly condemned Israel's decision to establish military facilities in one of the UN's compounds in the Sheikh Jarrah neighbourhood of East Jerusalem.
Israel's treatment of detained Gaza flotilla activists is "abominable", Canadian Prime Minister Mark Carney said Wednesday, following the release of a video showing Israeli police forcing activists to kneel on the ground in rows with their hands tied behind their backs.
Two Chinese tankers laden with oil exited the Strait of Hormuz on Wednesday, shipping data showed, brightening hopes that the US-Israeli conflict with Iran may soon be resolved after positive comments from president Donald Trump and his deputy.
SpaceX aims to reach 10,000 launches annually within five years, but government officials will need to see improved reliability before approving such an expansion, the head of the Federal Aviation Administration said on Wednesday.