Pakistan says it will respond to any threat to Saudi Arabia

However, both Saudi Arabia and Iran said on Sunday that the dispute would not affect a political process aimed at finding a route to peace in the Syrian civil war.

Opening a meeting of Arab League diplomatic chiefs in Cairo, senior Egyptian diplomat Nabil al-Arabi accused Tehran of “provocative acts” and called for Arab unity.

Iran’s Foreign Minister Mohammad Javad Zarif has warned that his country’s patience with Saudi Arabia has its limits, while accusing Riyadh of extremism and causing tensions in the region.

Iran and Saudi relations deteriorated sharply in recent days after the execution of prominent Shiite cleric and dissident Sheikh Nimr al-Nimr by Riyadh last week.

The executions have sent large number of Iranians onto the street, while some of them stormed Saudi diplomatic missions in capital Tehran and the northeastern city of Mashhad.

But after the talks in Tehran, and with Saudi officials in the last week, de Mistura said both countries had vowed to continue to support peace efforts.

Relations between Iran and Saudi Arabia soured dramatically following the execution of Nimr al-Nimr, an outspoken critic of the Saudi monarchy, along with 46 other people convicted of terrorism on January 2.

Earlier, Saudi Foreign Minister Adel al Jubeir said that his country would talk about taking further actions against Iran with its regional and worldwide allies if it had to. “In Iran I got the same assurance”, he said. “If not, it will be further isolated”, said the minister.

Riyadh, which is leading an Arab military intervention against Iran-backed Shiite rebels in Yemen, denied the accusation, saying no operations were carried out near the mission.

Rahmani Fazli also said that the ministry was collecting evidence, and in the case that the evidence corroborated the hypothesis of a Saudi hidden hand behind the embassy attack, “we will take necessary measures”.

Chaired by Custodian of the Two Holy Mosques King Salman bin Abdulaziz Al Saud, the Cabinet commended the judiciary’s efficiency and its independence and integrity, Saudi Press Agency, SPA, reported on Monday.

Iranian President Hassan Rouhani strongly condemned the attacks as “totally unjustifiable”, urging judiciary chief Ayatollah Sadegh Larijani to deal with wrongdoers immediately.

Officials believe there are more than 1,000 supporters of the hardline Sunni group the Islamic State in Iraq and Syria in Indonesia (ISIS), and say that scores of Indonesian ISIS activists have returned from the Middle East.