In late December 2017 and early January 2018, Iranian women began protesting the country's compulsory hijab law by publicly removing their headscarves. The protests, which took place in Tehran and other Iranian cities, were organized largely through social media. The women who took part in the protests were arrested and detained by Iranian authorities.
The protests were sparked by a change in the law that requires Iranian women to wear a hijab in public. The change, which was announced in late December 2017, led to a wave of protests by Iranian women. The women who took part in the protests were arrested and detained by Iranian authorities.
Mahsa Amini, a 22-year-old Kurdish woman from the north-western city of Saqez, died in hospital on Friday, after spending three days in a coma.
She was visiting the capital Tehran with her family when she was arrested by the morality police, who accused her of violating the law requiring women to cover their hair with a hijab and their arms and legs with loose clothing. She collapsed after being taken to a detention center to be "educated".
There are reports that officers beat Ms. Amini's head with a baton and banged her head against one of their vehicles.
Nine people are now reported to have been killed at protests in Iran sparked by the death of a woman detained for allegedly breaking strict hijab rules.
Among those reported killed is a 16-year-old boy, shot dead when security forces opened fire on protesters. The unrest has spread to more than 20 major cities, including the capital Tehran.
Videos posted online from Wednesday's unrest showed women waving their headscarves in the air or burning them. "No to the headscarf, no to the turban, yes to freedom and equality!" protesters were heard chanting at a demonstration in Tehran.