Iranian security forces released Mahsa Amini's father on Saturday after briefly detaining and warning him against marking the anniversary of her death, a human rights group said.
A source close to the family confirmed a report by the Norway-based human rights group Hengaw that Amjad Amini was arrested as he was leaving his house in western Iran.
Mahsa Amini's death in police custody a year ago unleashed months of anti-government protests that spiralled into the biggest show of opposition to the authorities in years.
Iranian officials were not immediately reachable by Reuters for comment.
Saudi Arabia intercepts and destroys drone in Mecca region
Six feared dead in helicopter crash in Indian Himalayan state, media report
Russia, Ukraine say aid is entering Oleshky, residents can leave if they wish
Four killed as Italian helicopter in EU mission in Bosnia crashes
Spanish rescuers search for victims as train crash death toll rises to 69
