An estimated 180,000 people have gathered in Hong Kong to mark 30 years since China’s crackdown on pro-democracy protesters in Tiananmen Square.

The annual candlelight vigil, organised by a group of veteran pro-democracy activists, demands justice for victims of the crackdown and calls for China to embrace democracy.

This year’s commemoration takes place amid controversy over plans by the city’s pro-Beijing government to allow extraditions to the Chinese mainland for the first time, causing fears that the freedoms enjoyed by Hong Kong citizens are gradually being eroded.