On Tuesday, memorial services were held in cities across Iran for those killed in the brutal crackdown on nationwide anti-establishment protests.

In several cities, clashes broke out between mourners, riot police and the Islamic Revolutionary Guard Corps (IRGC), while at some ceremonies, families of the dead danced and clapped their hands.

Marking the 40th day after a death, known as Chehellom, is a long-established tradition in Iran.

During the 1979 Islamic Revolution, similar ceremonies were held for protesters killed by the Shah’s security forces and army.

In recent years, this tradition has transformed into a protest strategy for organising demonstrations against Iran’s current rulers.