Iranian security forces arrested environmental activists Houman Jokar and Sepideh Kashani at their home on Wednesday and seized their electronic devices, their lawyer said.
Lawyer Hojjat Kermani said Kashani's sister, Sima Kashani, was also arrested. He said it was not immediately clear which security agency had detained the three, according to the Emtedad news website.
Kermani said the arrests, ahead of a long public holiday and the closure of judicial offices, had increased concern among their families.
Jokar and Kashani were among a group of environmental activists arrested in 2018 by the Revolutionary Guards' intelligence organization. They were later convicted on espionage charges after a case that drew criticism from human rights groups and UN experts over the arrests, interrogations and trial.
Jokar was sentenced to eight years in prison and Kashani to six years. The other defendants were released from Tehran's Evin prison at different times, with the last of them freed in April 2024.
One of the defendants, Iranian-Canadian conservationist Kavous Seyed-Emami, died in custody about a month after his arrest in 2018. Iranian judicial officials said he had killed himself, a conclusion rejected by his family.
The latest arrests come amid reports by rights groups of a new wave of detentions of civil, political and labor activists across Iran following recent unrest and the war with Israel and the United States.
