The woman, Mahsa Amini, who also went by the name Jina, was detained on the streets of Tehran on Tuesday while visiting the capital with her family from the city of Saqiz in Kurdistan province, according to news reports. Iran’s mandatory hijab law, which went into effect in 1981 after the Islamic revolution, has long been challenged by many women, and in recent years some have appeared in public without the required scarf and robe.