Iranian authorities have executed Mohsen Darabi, a prisoner from Kermanshah who had been sentenced to death on drug-related charges, in Isfahan Central Prison.
The Kurdistan Human Rights Network (KHRN) has learned that Darabi was transferred to solitary confinement last week and executed in the early hours of 19 August.
At least three other prisoners were reportedly executed alongside him.
Darabi, a father of one, was arrested several years ago on drug-related charges and subsequently sentenced to death.