At Berlin's Brandenburg Gate, more than 30 former Iranian political prisoners continued a three-day hunger strike, camping out with mats and blankets on a cool, rainy summer day.

The group are demanding the abolishment of the death penalty and the separation of religion and state.

Similar demonstrations took place in Paris, Rome and New York.

At least 20 people were killed in mass protests in Iran in the past weeks. Amnesty estimates that more than 2,000 people have been arrested.