The Iranian authorities must immediately and unconditionally release a woman arrested on 27 December 2017 in Tehran for engaging in a peaceful protest against compulsory veiling (hijab), Amnesty International said today. The organization renewed its calls on the Iranian authorities to end the persecution of women who speak out against compulsory veiling, and abolish this discriminatory and humiliating practice. This practice has violated women’s rights in Iran for decades, including their rights to non-discrimination, freedom of belief and religion, freedom of expression, and protection from arbitrary arrests and detention, torture and other cruel, inhuman or degrading treatment or punishment.