Amnesty International says Iran has arrested 7,000 people in a "shameless repression campaign" last year.
The people hit by the crackdown included demonstrators, students, lawyers, journalists, environmental and women's rights activists, and trade unionists.
Hundreds were sentenced to prison or flogging. At least 26 protesters were killed and nine others died in custody.
The crackdown was a response to the unrest over poverty, corruption and the lack of political and social freedoms.
"From underpaid teachers to factory workers struggling to feed their workers families, those who dared to claim their rights in Iran today have paid a high price," said Philip Luther, the director from Amnesty in the Middle East and North Africa.
Women's Rights Defenders
Amnesty said at least 1
The well-known human rights lawyer Nasrin Sotoudeh, who defended women who had been arrested for the protests, was arrested in June and faces multiple national security charges. Ms. Sotoudeh's husband, Reza Khandan, who campaigned for her release, was sentenced to six years in prison on Wednesday.
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According to reports, at least 63 activists and researchers were imprisoned in 2018.
The authorities accused a number of people of having filed evidence without evidence that they had collected classified information about Iran's strategic areas under the pretext of carrying out environmental and scientific projects Amnesty.
Five activists – Morad Tahbaz, Niloufar Bayani, Houman Jokar, Sepideh Kashani, and Taher Ghadirian – were charged with "corruption on earth," a capital offense.
Workers and Trade Unionists
The worsening economic crisis in Iran – the result of United States sanctions, government mismanagement and corruption – triggered strikes and protests from people demanding better working conditions and higher wages.
At least 467 people, including 23 teachers, lorry drivers and factory workers, were arrested and dozens sentenced to prison terms. Thirty-eight people got eyelashes.
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Amnesty said that more than 200 members of the largest Iranian Sufi Muslim Order, the Gonabadi, too Prison sentences and lashes were condemned to participate in peaceful protests that were violently repressed by security forces in February.
One man, Mohammad Salas, was executed in June after being convicted of murdering three police officers who were run over by a bus in a protest. Amnesty said a witness who gave him an alibi was not allowed to testify in his trial.
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At least 20 were given long prison terms or flogging after Amnesty had condemned unfair trials.
Mohammad Hossein Sodagar, a journalist from the Azerbaijani Turkish ethnic minority, received 74 lashes after "spreading lies".