Tuesday briefing: What has sparked Iran’s latest wave of protests – and what might happen next

In today's newsletter: A researcher with a focus on the region explains what's behind deadly nationwide demonstrations and what a hardening of public opinion against the state might bring

Good morning. At least 648 people have been killed by Iran's security services during nationwide demonstrations, with more than 10,600 arrested. The unrest is widely seen as the most serious challenge to Iran's Islamic Republic in recent years.

People took to the streets for reasons ranging from rising economic hardship to long-simmering anger over political repression and civil rights. Together, they represent a hardening of public opinion against the state.

Iran | Donald Trump is unafraid to use military force on Iran", the White House said on Monday as the regime faced continued unrest across the country. The Iranian foreign minister claimed protests were under total control".

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