Hello, I'm Celia Hatton and welcome to NewsHour from the BBC World Service,
coming to you live from London.
We're starting the programme today in Iran,
where the most intense street protests we've seen in years continue to unfold in the country of 91 million people.
Information is difficult to obtain.
The internet and phone networks remain shut down,
but all signs point to an intensifying crackdown against the demonstrators by the authorities.
And despite the blackout, some videos have made it out of the country.
This video from Friday night shows a burning mosque in Tehran next to the excited crowd you can hear here.
State media confirmed the mosque had been burned and Iran's Revolutionary Guard issued a statement saying the military would protect public property.
And earlier today, Reza Palavi, the son of Iran's late Shah,
said he was preparing to return to Iran.
He called on Iranians to keep coming out onto the streets.
Your renewed and magnificent presence in the streets across Iran on Friday evening was a crushing response to the threats of the treacherous and murderous leader of the Islamic Republic.
In this regard, I call on workers and employees in key sectors of the economy,
especially transportation, oil, gas and energy, to begin a nationwide strike.
I also ask all of you, today and tomorrow, Saturday and Sunday, this time from 6pm,
to come into the streets with flags, images and national symbols,
and to claim public spaces as your own.
Parham Gobadi is a reporter from BBC Persian,