Here are the latest updates:
- Bahrain, Sudan and the UAE join Saudi Arabia in severing ties with Iran
- Moscow says Syria record shows it would be perfect mediator in Saudi-Iran row
- At least two Sunni mosques attacked in Shia-majority Iraqi city
- Iranian minister accuses Saudi Arabia of escalating tensions to cover up executions
- Chinese goverment says it is 'highly concerned' by Middle East developments
- UK officials rush to investigate Isis video featuring 'British' militant and child
- One dead as gunmen open fire on police in home village of executed cleric
- Iranian diplomats expelled from Riyadh as Saudis sever ties
- UK Government urged to come clean over role in Saudi human rights
- Executions 'pose bigger threat to region than Isis'
- Isis execution video includes threat to UK and 'imbecile' David Cameron
- Footage seeks to create 'new Jihadi John' and includes young child
- The political protesters killed in Saudi Arabia - and those still on death row
Iran accused Saudi Arabia this morning of severing diplomatic ties and raising international tensions in the region in order to cover up its own domestic problems.
In a statement, a spokesperson for Iran's foreign ministry said the storming of the Saudi embassy in Tehran in the early hours of Sunday was being used as a pretext to escalate the crisis.
That incident came in response to Saudi Arabia's execution of 47 people on Saturday, including prominent Shia cleric Sheikh Nimr al-Nimr.
Iran's Hossein Jaberi Ansari said: "Iran... is committed to provide diplomatic security based on international conventions. But Saudi Arabia, which thrives on tensions, has used this incident as an excuse to fuel the tensions."
Meanwhile, the British security services said they were investigating a video released by the Isis militant group on Sunday which claimed to show the execution of five UK spies.
The footage included a "message" for David Cameron and a threat to wage war on Britain, and featured a militant and young child speaking in British accents.Reuse content