Saudi Arabia should be applauded for the execution of Sheikh Nimr Baqr Al Nimr, the country's foreign minister has said.
Adel al-Jubeir told the Reuters news agency that Sheikh Nimr was a terrorist engaged in "terrorist acts" and his country shouldn't be facing criticism for the execution.
Al-Jubeir also told reporters that Iran was responsible for the rising tensions between the two countries.
All air traffic between Saudi Arabia and Iran is to be 'cut off', a Saudi official has said.
According to Reuters Saudi's foreign minister has said "all air traffic" and "all commercial ties" will be halted between the two nations and the country's citizens will be banned from travelling to Iran.
Thousands of protesters staged a demonstration close to the newly reopened Saudi embassy in Baghdad on Monday in a show of anger at the execution of Shia cleric Nimr al-Nimr.
Protesters carrying posters of al-Nimr chanted "Damned, damned be Al Saud!", in reference to the Saudi Royal family as tensions continued to intensify after the mass execution of 47 people, including the cleric, in Saudia Arabia on Saturday.
Sudan has reportedly expelled its Iranian ambassador in protest to the attack on Saudi Arabia's embassy in Tehran.
The Tehran embassy was stormed by protesters on Sunday following Saudi Arabia's mass execution of 47 people, including a prominent Shia cleric.
News of the Iranian ambassador's expulsion was announced on Saudi state television on Monday as tensions continued to mount between the two countries.
Sudan's foreign ministry confirmed today that it has cut diplomatic ties with Iran.
The United Arab Emirates has announced that it will be downgrading its ties with Iran and cutting the number of Iranian diplomats it allows to be in the country, according to local media reports.
State news agency WAM said the government had also decided to reduce the number of UAE diplomats posted to Iran amid growing tensions between Iran and Saudi Arabia.
Germany is "not planning" on imposing sanctions against Saudi Arabia in the wake of the country's mass execution of 47 people including a Shia cleric, a top official confirmed today.
Ministry spokesman Martin Schaefer told a news conference that Germany opposed the death penalty but said he was "unaware of any government plans at the moment to impose sanctions for this reason."
Schaefer's comments came as the German government called on Saudi Arabia and Iran to engage in talks with each other after ties between the two countries started to disintegrate in the wake of protests over the executions.
Bahrain has announced it is "severing diplomatic ties" with Iran following the storming of the Saudi embassy in Tehran.
According to reports in state media Iranian diplomats have been told to leave Bahrain within 48 hours.
Russia is reportedly ready to act as an intermediary to help settle the dispute between Iran and Saudi Arabia after the two countries cut ties in the wake of growing tensions.
Russian news agency RIA, said a Foreign Ministry source said that "as friends" they "would be ready to play, if it is demanded, an intermediary role in ... settling the existing contradictions and any new ones that arise between these two countries."
The Russia's foreign ministry has also officially expressed "serious concern" about the worsening situation between the two countries and urged them both "to show restraint and avoid any steps that would complicate the situation".
Labour has raised questions over the government's ties with Saudi Arabia as tensions continue to escalate following the mass execution of 47 people at the weekend.
Shadow Minister for Human Rights Andy Slaughter wrote to Justice Secretary Michael Gove on Monday asking about the level of cooperation put in place between the two nations by a memorandum of understanding on judicial cooperation, signed in September 2014, and urging ties be cut.
Writing that he felt it "would be inappropriate at present for the UK to be seen to be cooperating with the Saudi justice system", Slaughter urged the government to "suspend any cooperation on judicial matters with Saudi Arabia in the light of the recent executions".