The BBC has received eyewitness accounts of security forces attacking anti-government protesters across the country.

Latest updates from the BBC's specialists in fact-checking, verifying video and tackling disinformation.

The authorities are responding to protests with a ferocious security crackdown and near total internet shutdown.

The US president and his administration have threatened "very strong options" to intervene in Iran, including military action.

Hundreds of people are believed to have been killed, as days of large demonstrations threaten the regime. Here's what you need to know.