Saudi Arabia has cut diplomatic ties with Iran over the storming of its embassy in Tehran on Saturday. The move comes while relations between the regional rivals are plunging over the execution of a top Shiite cleric.

Speaking at a press conference on Sunday, Foreign Minister Adel al-Jubeir demanded that the Iranian diplomatic mission and related entities leave the country within 48 hours.

He said Riyadh would not allow the Islamic Republic to undermine the Sunni kingdom’s security.

The Saudi diplomats who were evacuated from Tehran following Saturday night’s attack have arrived in Dubai en route to Saudi Arabia, Al Arabiya reported.

The move comes after angry Iranian protesters stormed and set ablaze the Saudi embassy in Tehran on Saturday night during a rally in condemnation of Riyadh’s execution of prominent Shia cleric Sheikh Nimr al-Nimr.

Nimr was among 47 people beheaded or shot by firing squad across Saudi Arabia on Saturday in the biggest single-day execution spree since 1980.

All but four of the condemned were convicted as Al-Qaeda members, while Nimr and three other Shias were accused of inciting riots among Saudi Arabia’s Shia minority between 2010 and 2012, when Nimr was arrested.

The execution of Nimr, a public figure popular with youths, alongside terrorists responsible for a series of bombings carried out between 2003 and 2006, provoked additional outrage in the Shia world.

Iran summoned the Saudi ambassador, and just hours later, a mob set fire to the Saudi embassy in Tehran, chanting “Death to Al Saud!” – the ruling family of Saudi Arabia.

Police were forced to use tear gas to disperse the protesters, who made their way into the building and trashed the ground floor of the embassy, tearing apart Saudi flags, furniture and documents.

The building then caught fire and was engulfed in huge big blaze, apparently caused by Molotov cocktails thrown by the rioters.