Addressing an estimated 250,000 people in Munich, Reza Pahlavi - who has called for the overthrow of Iran’s Islamic regime - denounced a crackdown on recent protests there.

Munich, Los Angeles and Toronto saw the largest crowds, with smaller protests in cities including Tel Aviv, Lisbon, Sydney and London.

It is estimated that more than 6,000 people have been killed after joining demonstrations against Iran’s rising cost of living, which transformed into a wider anti-government movement.

Pahlavi told the crowd: “My first message is to our brave and fighting compatriots inside the country: know that you are not alone, and today the world stands with you in this struggle.”