Iran executed four Afghan prisoners in Vakliabad Prison in Mashhad on Thursday morning, a human rights group reported.
Haalvsh said that the individuals had been arrested in 1398 over drug-related charges and then sentenced to death by the court.
This organization announced the names of the executed prisoners as Zaman Taheri, Salam Taheri, Gholam Qadir Samani and Ebrahim Noorzahi.
Zaman Taheri and Salam Taheri were brothers.
Iranian officials have not commented about the matter so far.