TOPSHOT - This image obtained from the Iranian news agency IRNA on October 16, 2022, shows a fire truck in front of the Evin prison, in the northwest of the Iranian capital Tehran.
Families of inmates gathered Sunday near the prison hoping for news of their loved ones inside.
Another man, Reza, who also gave only his first name, said his brother has been in Evin Prison since last year after he was involved in a violent quarrel.
Iranian social media posts challenged state media claims over the cause of the fire and apparent explosions at the prison.
Evin Prison, which holds detainees facing security-related charges and includes dual citizens, has been charged by rights groups with abusing inmates.