Iran was largely cut off from the outside world on Friday after authorities blacked out the internet to curb growing unrest, and videos showed buildings aflame in anti-government protests raging in cities across the country.

Protests in Iran are intensifying due to the country's struggling economy, putting pressure on its theocracy as it has shut down the internet and telephone networks.

Protests broke out in several cities across Iran on Thursday despite a violent crackdown by security forces that has left dozens dead and led authorities to shut down the internet nationwide in an att

Iran facing "nationwide internet blackout," monitoring group says, amid hope that 12 days of deadly protests may swell into a tipping point against a repressive regime.

All communication and information flows out of and within Iran were down overnight and into Friday due to a total Internet blackout amid grave unrest.

Exiled Iranian Crown Prince Pahlavi appeals to President Donald Trump for immediate intervention as Iran implements internet blackout amid deadly protests.