Foreign Minister Adel bin Ahmed Al-Jubeir announced the Kingdom of Saudi Arabia's decision breaking off its diplomatic relations with Iran and requesting all personnel of its diplomatic mission (the embassy, consulate and other affiliated offices) to leave the country within 48 hours.
This came in a press conference the minister held at the foreign ministry's headquarters in Riyadh this evening.
Briefing reporters on the details of developments of aggressive incidents incurred by the embassy of the Kingdom of Saudi Arabia in Tehran and its consulate general in the Iranian city of Mash-had, Ambassador Osama Nogali, the Head of the Information Department at the Foreign Ministry, said the Embassy in Tehran received several telephone calls on Saturday morning 22/3/1437H. threatening to kill its personnel; at 2:20p.m. on the same day, crowds of mobs started to gather in front of the embassy, triggering the Charge d'Affaires a.i. to immediately notify the Iranian foreign ministry of the development, demanding protection of the embassy, but in vain; at 9:30p.m. on Saturday 22/3/1437H., another crowd of demonstrators gathered in front of the embassy, hurling stones and incendiary bombs at the building; at about 2:00a.m. early dawn on Sunday 23/3/1437 H., it was noted that the first crowd was replaced by a new crowd whereas two members stormed the embassy and set parts of its ablaze; at nearly 2:30a.m. at dawn on Tehran standard time, the crowd stormed the embassy building with the Charge d'Affaires a.i. continuing contacting anew the foreign ministry but his calls went unanswered; the Charge d'Affaires a.i. tried to obtain secured protection to come and inspect the embassy headquarters but his request was not met until Sunday 23/3/1437H. in the late afternoon to find that the building was devastated and destroyed, its contents broken and devices, appliances and furniture robbed and stolen; at 3:30a.m. at dawn on Sunday 23/3/1437H., the electricity was cut off for one hour from the district in which the embassy personnel homes are located. 
At the Saudi consulate in Mash-had, the following incidents took place:
At 11:00a.m. on Saturday 22/3/1437 H., a taxi forced its way across the security barrier of the consulate, attempting to storm the interior gate of the consulate without being prevented by the Iranian authority; at 4:30 p.m. on Saturday 22/3/1437 H., a crowd estimated at more than 2,000 persons gathered in front of the consulate building, hurling stones and incendiary bottles, leading to breaking some external glass windows of the building with a group of them trying to storm the building but failed combined with the negative response of the Iranian authorities which did not exert any effort to stop such criminal acts or arrest the involved.
It deserves mentioning that this is not the first time that the Kingdom's diplomatic mission in Tehran and Mash-had face such hostilities. Similar offenses have precedent in the past years before the very eyes and ears of the Iranian government without any measures taken to preserve the security and safety of the Kingdom's mission and its personnel or bringing the culprits to justice.
Accordingly, the Kingdom of Saudi Arabia has taken the following measures:
First: The Iranian ambassador to the Kingdom was summoned on the evening of Saturday 22/3/1437H. at the headquarters of the Foreign Ministry and was given a strong protest note, holding the Iranian regime accountable of those attacks in its capacity as the host country required to provide the necessary protection for foreign missions according to international relevant agreements and laws.
Second: The Kingdom notified the United Nations Security Council of those hostilities as well as the Gulf Cooperation Council, the Arab League, and the Organization of Islamic Cooperation and demanded the UN Security Council to guarantee the protection of diplomatic missions and their personnel according to international agreements and laws.
Third: All countries with which the Kingdom shares relations have been briefed on the hostile statements issued by the Iranian government, a provocation triggering the breaching of sanctity of the Saudi embassy in Tehran and the consulate general in Mash-had.
Fourth: Extraordinary measures were taken to evacuate some 47 dependants, including women and children, of the Saudi diplomats and officials in Iran. They were presumed to leave aboard the Emirates flight which departs at 7:20 p.m. on Tehran Standard Time but the Iranian authorities hindered their departure which was changed to a substitute flight at 10:00 p.m. this evening on Tehran Standard Time. At this moment, they are on their way en route home. In this regard, we express thanks to the United Arab Emirates for the help its rendered to evacuate the members of the mission from Iran. We also thank the GCC, the Arab League and a number of countries who vowed strong and firm positions against attacks targeting the Saudi diplomatic mission in Iran.
In conclusion, let me reassure you that all members of the diplomatic mission and its personnel in Tehran and Mash-had are safe and nobody was subject to any harm, be them the departees or the stayers behind. We are keen to guarantee their security and safety through continuous follow-up.
Then, the Foreign Minister Adel bin Ahmed Al-Jubeir delivered the following speech:
"After having been briefed on the details of the hostilities which the Saudi diplomatic mission in Iran sustained, I would like to further inform you that the Iranian regime has a long record of violations of foreign diplomatic missions. I, herewith, cite the occupation of the U.S. embassy in 1979, the attack against the British embassy in 2011 and yesterday's offense against the Saudi Arabian embassy in Tehran and consulate general in Mash-had.
Such continual assault on diplomatic missions constitutes a flagrant violation of all international agreements, charters and treaties.
Also, these attacks come after aggressive statements issued by Iranian prominent figures, a blatant provocation that encouraged others to attack the Kingdom's missions.
These offenses are considered a continuation of the Iranian hostile policy in the region aiming at destabilizing the region's security and stability and spreading sedition and wars.
This matter is certain as the Iranian regime provides safe havens on its territories for Al-Qaeda leaders since 2001.
The Iranian regime has also provided protection for a number of the involved in Al-Khober Towers explosion in 1996.
In addition to these hostile attacks, the Iranian regime has managed to smuggle weapons and explosives, plant terrorist cells in the region, including the Kingdom, aiming to spread chaos and unrest.
The history of Iran is full of negative and hostile interference in Arab countries affairs, always accompanied with subversion, demolition and killing of innocent souls.
Upon these realities, the Kingdom of Saudi Arabia announces cutting its diplomatic ties with Iran and demands all the members of Iran's diplomatic mission (embassy, consulate and other offices affiliated to them) to leave within 48 hours.
The Iranian ambassador to the Kingdom was summoned to notify him of this development".