Iranians are marking the one-year anniversary of the death in custody of Mahsa Amini and the ensuing anti-regime protests amid a menacing atmosphere, as continued crackdown by Iranian authorities on any sign of dissent.

Iranian authorities have responded with a harsh crackdown to the peaceful protests that erupted last September in response to Amini's death, killing more than 500 people and arresting thousands of others, according to the Human Rights in Iran News Agency. Meanwhile, hundreds have been executed despite pleas from rights organizations and activists who accuse authorities of conducting unfair trials and extracting confessions under torture. The Oslo-based group Iran Human Rights has tracked and confirmed the execution of at least 697 people between September 2022 and September 2023.

The following is a timeline of key events since Amini’s arrest and death in custody of Iran's morality police for improperly wearing the hijab. 

Sept. 13, 2022: Mahsa Amini, a 22-year-old woman from Saqqez in Iran’s Kurdistan region, is visiting Tehran with her brother when the morality police arrest her for allegedly wearing her headscarf too loosely, in violation of the Islamic Republic’s strict dress code for women.